Document:

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                                                                    Exhibit 10.2

THIS WARRANT AND THE SHARES OF COMMON STOCK ISSUABLE UPON EXERCISE HEREOF HAVE
NOT BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933, AS AMENDED (THE
"SECURITIES ACT"), OR ANY STATE SECURITIES LAWS AND MAY NOT BE SOLD, TRANSFERRED
OR OTHERWISE DISPOSED OF UNLESS REGISTERED UNDER THE SECURITIES ACT AND UNDER
APPLICABLE STATE SECURITIES LAWS OR COMMONWEALTH BIOTECHNOLOGIES, INC. SHALL
HAVE RECEIVED AN OPINION OF ITS COUNSEL THAT REGISTRATION OF SUCH SECURITIES
UNDER THE SECURITIES ACT AND UNDER THE PROVISIONS OF APPLICABLE STATE SECURITIES
LAWS IS NOT REQUIRED.

                           WARRANT TO PURCHASE SHARES

                               OF COMMON STOCK OF

                       COMMONWEALTH BIOTECHNOLOGIES, INC.

                             Expires August 29, 2007

No.: SW-1

Number of Shares: 27,778

Date of Issuance: August 30, 2002

         FOR VALUE RECEIVED, subject to the provisions hereinafter set forth,
the undersigned, COMMONWEALTH BIOTECHNOLOGIES, INC., a Virginia corporation
(together with its successors and assigns, the "Issuer"), hereby certifies that
Samuel P. Sears, Jr. (the "Investor") or its registered assigns is entitled to
subscribe for and purchase, during the period specified in this Warrant, up to
27,778 shares (subject to adjustment as hereinafter provided) of the duly
authorized, validly issued, fully paid and non-assessable shares of Common Stock
of the Issuer, at an exercise price per share equal to the Warrant Price then in
effect, subject, however, to the provisions and upon the terms and conditions
hereinafter set forth. Capitalized terms used in this Warrant and not otherwise
defined herein shall have the respective meanings specified in Section 8 hereof.

         1. Term. The right to subscribe for and purchase shares of Warrant
Stock represented hereby shall commence on August 30, 2002, and shall expire at
5:00 p.m., eastern time, on August 29, 2007 (such period being the "Term").

         2. Method of Exercise Payment; Issuance of New Warrant; Transfer and
Exchange.

                 (a) Time of Exercise. The purchase rights represented by this
Warrant may be exercised in whole or in part at any time and from time to time
during the Term.

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                  (b) Method of Exercise. This Warrant may be exercised at any
time or from time to time during the Term by surrendering it at the principal
office of the Issuer, at 601 Biotech Drive, Richmond, Virginia 23235, with the
subscription form duly executed, together with payment in an amount equal to the
Warrant Price in effect on the date of such exercise multiplied by the number of
shares of Warrant Stock with respect to which this Warrant is then being
exercised. Payment of this amount may be made (i) by payment in cash or by
corporate check, payable to the order of the Issuer, or (ii) by the Issuer not
issuing that number of shares of Warrant Stock having an aggregate Fair Market
Value equal to such sum, as the Investor may determine. This Warrant may be
exercised for less than the full number of shares of Warrant Stock at the time
called for hereby, except that the number of shares of Warrant Stock receivable
upon exercise of this Warrant as a whole, and the aggregate Warrant Price, shall
be proportionately reduced.

                  (c) Issuance of Stock Certificates. In the event of any
exercise of the rights represented by this Warrant in accordance with and
subject to the terms and conditions hereof, (i) certificates for the shares of
Warrant Stock so purchased shall be dated the date of such exercise and
delivered to the Holder hereof within a reasonable time after such exercise, and
the Holder hereof shall be deemed for all purposes to be the Holder of the
shares of Warrant Stock so purchased as of the date of such exercise, and (ii)
unless this Warrant has expired, a new Warrant representing the number of shares
of Warrant Stock, if any, with respect to which this Warrant shall not then have
been exercised shall also be issued to the Holder hereof at the Issuer's expense
within such time.

                  (d) Transferability of Warrant. Subject to Section 2(e), this
Warrant may not be transferred by a Purchaser without the consent of the Issuer,
which consent shall not be unnecessarily withheld. If transferred pursuant to
this paragraph with the consent of the Issuer and subject to the provisions of
subsection (e) of this Section 2, this Warrant may be transferred on the books
of the Issuer by the Holder hereof in person or by duly authorized attorney,
upon surrender of this Warrant at the principal office of the Issuer, properly
endorsed and upon payment of any necessary transfer tax or other governmental
charge imposed upon such transfer. This Warrant is exchangeable at the principal
office of the Issuer for Warrants for the purchase of the same aggregate number
of shares of Warrant Stock, each new Warrant to represent the right to purchase
such number of shares of Warrant Stock as the Holder hereof shall designate at
the time of such exchange. All Warrants issued on transfers or exchanges shall
be dated the Original Issue Date and shall be identical with this Warrant except
as to the number of shares of Warrant Stock issuable pursuant hereto.

                  (e) Compliance with Securities Laws.

                           (i) The Holder of this Warrant, by acceptance
hereof, acknowledges that this Warrant and the shares of Warrant Stock to be
issued upon exercise hereof are being acquired solely for the Holder's own
account and not as a nominee for any other party, and for investment, and that
the Holder will not offer, sell or otherwise dispose of this Warrant or any
shares of Warrant Stock to be issued upon exercise hereof except pursuant to an
effective registration statement, or an exemption from registration, under the
Securities Act and any applicable state securities laws.

                           (ii) Except as provided in paragraph (iii) below,
this Warrant and all certificates representing shares of Warrant Stock issued
upon exercise hereof shall be stamped or imprinted with a legend in
substantially the following form:

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THIS WARRANT AND THE SHARES OF COMMON STOCK ISSUABLE UPON EXERCISE HEREOF HAVE
NOT BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933, AS AMENDED (THE
"SECURITIES ACT"), OR ANY STATE SECURITIES LAWS AND MAY NOT BE SOLD, TRANSFERRED
OR OTHERWISE DISPOSED OF UNLESS REGISTERED UNDER THE SECURITIES ACT AND UNDER
APPLICABLE STATE SECURITIES LAWS OR COMMONWEALTH BIOTECHNOLOGIES, INC. SHALL
HAVE RECEIVED AN OPINION OF ITS COUNSEL THAT REGISTRATION OF SUCH SECURITIES
UNDER THE SECURITIES ACT AND UNDER THE PROVISIONS OF APPLICABLE STATE SECURITIES
LAWS IS NOT REQUIRED.

                  (iii) The restrictions imposed by this subsection (e) upon the
transfer of this Warrant or the shares of Warrant Stock to be purchased upon
exercise hereof shall terminate (A) when such securities shall have been resold
pursuant to being effectively registered under the Securities Act, (B) upon the
Issuer's receipt of an opinion of counsel, in form and substance reasonably
satisfactory to the Issuer, addressed to the Issuer to the effect that such
restrictions are no longer required to ensure compliance with the Securities Act
and state securities laws or (C) upon the Issuer's receipt of other evidence
reasonably satisfactory to the Issuer that such registration and qualification
under state securities laws is not required; provided, that the restrictions
imposed by the last sentence of the legend with respect to the transfer of this
Warrant shall not terminate. Whenever such restrictions shall cease and
terminate as to any such securities, the Holder thereof shall be entitled to
receive from the Issuer (or its transfer agent and registrar), without expense
(other than applicable transfer taxes, if any), new Warrants (or, in the case of
shares of Warrant Stock, new stock certificates) of like tenor not bearing the
applicable legend required by paragraph (ii) above relating to the Securities
Act and state securities laws.

         3. Stock Fully Paid; Reservation; Covenants.

                  (a) Stock Fully Paid. The Issuer represents, warrants,
covenants and agrees that all shares of Warrant Stock which may be issued upon
the exercise of this Warrant or otherwise hereunder will, upon issuance, be duly
authorized, validly issued, fully paid and non-assessable and free from all
taxes, liens and charges created by or through the Issuer.

                  (b) Reservation. The Issuer further covenants and agrees that
during the period within which this Warrant may be exercised, the Issuer will at
all times have authorized and reserved for the purpose of the issue upon
exercise of this Warrant a sufficient number of shares of Common Stock to
provide for the exercise of this Warrant.

                  (c) Covenants. The Issuer shall not by any action including,
without limitation, amending the Articles of Incorporation or the bylaws of the
Issuer, or through any reorganization, transfer of assets, consolidation,
merger, dissolution, issue or sale of securities or any other action, avoid or
seek to avoid the observance or performance of any of the terms of this Warrant,
but will at all times in good faith assist in the carrying out of all such terms
and in the taking of all such actions as may be necessary or appropriate to
protect the rights of the Holder hereof against dilution (to the extent
specifically provided herein) or impairment. Without limiting the generality of
the foregoing, the Issuer will (i) not permit the par value, if any, of its
Common Stock to exceed the then effective Warrant Price and (ii) take all such
action as may be reasonably necessary in order that the Issuer may validly and
legally issue fully paid and nonassessable shares of Common Stock, free and
clear of any liens, claims, encumbrances and restrictions (other than as
provided herein) upon the exercise of this Warrant.

                  (d) Loss, Theft, Destruction of Warrants. Upon receipt of
evidence satisfactory to the Issuer of the ownership of and the loss, theft,
destruction or mutilation of any Warrant and, in the case of any such loss,
theft or destruction, upon receipt of indemnity or security satisfactory to the
Issuer or, in the case of any such mutilation, upon surrender and

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cancellation of such Warrant, the Issuer will make and deliver, in lieu of such
lost, stolen, destroyed or mutilated Warrant, a new Warrant of like tenor and
representing the right to purchase the same number of shares of Common Stock.

         4. Adjustment of Warrant Price and Warrant Share Number. The number and
kind of Securities purchasable upon the exercise of this Warrant and the Warrant
Price shall be subject to adjustment from time to time upon the happening of
certain events as follows:

                  (a) Recapitalization, Reorganization, Reclassification,
Consolidation, Merger or Sale.

                      (i) In case the Issuer after the Original Issue Date shall
do any of the following (each, a "Triggering Event"): (a) consolidate with or
merge into any other Person and the Issuer shall not be the continuing or
surviving corporation of such consolidation or merger, or (b) permit any other
Person to consolidate with or merge into the Issuer and the Issuer shall be the
continuing or surviving Person but, in connection with such consolidation or
merger, any Capital Stock of the Issuer shall be changed into or exchanged for
Securities of any other Person or cash or any other property, or (c) transfer
all or substantially all of its properties or assets to any other Person, or (d)
effect a capital reorganization or reclassification of its Capital Stock, then,
and in the case of each such Triggering Event, proper provision shall be made so
that, upon the basis and the terms and in the manner provided in this Warrant,
the Holder of this Warrant shall be entitled upon the exercise hereof at any
time after the consummation of such Triggering Event, to the extent this Warrant
is not exercised prior to such Triggering Event, to receive at the Warrant Price
in effect at the time immediately prior to the consummation of such Triggering
Event in lieu of the Common Stock issuable upon such exercise of this Warrant
prior to such Triggering Event, the Securities, cash and property to which such
Holder would have been entitled upon the consummation of such Triggering Event
if such Holder had exercised the rights represented by this Warrant immediately
prior thereto, subject to adjustments (subsequent to such corporate action) as
nearly equivalent as possible to the adjustments provided for in Section 4.

                      (ii) Notwithstanding anything contained in this Warrant to
the contrary, the Issuer will not effect any Triggering Event unless, prior to
the consummation thereof, each Person (other than the Issuer) which may be
required to deliver any Securities, cash or property upon the exercise of this
Warrant as provided herein shall assume, by written instrument delivered to, and
reasonably satisfactory to, the Holder of this Warrant, (A) the obligations of
the Issuer under this Warrant (and if the Issuer shall survive the consummation
of such Triggering Event, such assumption shall be in addition to, and shall not
release the Issuer from, any continuing obligations of the Issuer under this
Warrant) and (B) the obligation to deliver to such Holder such shares of
Securities, cash or property as, in accordance with the foregoing provisions of
this subsection (a), such Holder shall be entitled to receive.

                  (b) Subdivision or Combination of Shares. If the Issuer, at
any time while this Warrant is outstanding, shall subdivide or combine any
shares of Common Stock, (i) in case of subdivision of shares, the Warrant Price
shall be proportionately reduced (as at the effective date of such subdivision
or, if the Issuer shall take a record of Holders of its Common Stock for the
purpose of so subdividing, as at the applicable record date, whichever is
earlier) to reflect the increase in the total number of shares of Common Stock
outstanding as a result of such subdivision, or (ii) in the case of a
combination of shares, the Warrant Price shall be proportionately increased (as
at the effective date of such combination or, if the Issuer shall take a record
of Holders of its Common Stock for the purpose of so combining, as at the
applicable record date, whichever is earlier) to reflect the reduction in the
total number of shares of Common Stock outstanding as a result of such
combination.

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                  (c) Certain Dividends and Distributions. If the Issuer, at any
time while this Warrant is outstanding, shall pay a dividend in, or make any
other distribution to its stockholders (without consideration therefor) of,
shares of Common Stock, the Warrant Price shall be adjusted, as at the 6 date
the Issuer shall take a record of the Holders of the Issuer's Capital Stock for
the purpose of receiving such dividend or other distribution (or if no such
record is taken, as at the date of such payment or other distribution), to that
price determined by multiplying the Warrant Price in effect immediately prior to
such record date (or if no such record is taken, then immediately prior to such
payment or other distribution), by a fraction (1) the numerator of which shall
be the total number of shares of Common Stock outstanding immediately prior to
such record date (or if no such record date is taken, then immediately prior to
such dividend or distribution), and (2) the denominator of which shall be such
number of shares plus the total number of shares of Common Stock constituting
such dividend or distribution.

                  (d) Other Action Affecting Common Stock. In case after the
Original Issue Date the Issuer shall take any action affecting its Common Stock,
other than an action described in any of the foregoing subsections (a) through
(f) of this Section 4, inclusive, and the failure to make any adjustment would
not fairly protect the purchase rights represented by this Warrant in accordance
with the essential intent and principle of this Section 4, then the Warrant
Price shall be adjusted in such manner and at such time as the Board may in good
faith determine to be equitable in the circumstances.

                  (e) Adjustment of Warrant Share Number. Upon each adjustment
in the Warrant Price pursuant to any of the foregoing provisions of this Section
4, the Warrant Share Number shall be adjusted, to the nearest one hundredth of a
whole share, to the product obtained by multiplying the Warrant Share Number
immediately prior to such adjustment in the Warrant Price by a fraction, the
numerator of which shall be the Warrant Price immediately before giving effect
to such adjustment and the denominator of which shall be the Warrant Price
immediately after giving effect to such adjustment. If the Issuer shall be in
default under any provision contained in Section 3 of this Warrant so that
shares issued at the Warrant Price adjusted in accordance with this Section 4
would not be validly issued, the adjustment of the Warrant Share Number provided
for in the foregoing sentence shall nonetheless be made and the Holder of this
Warrant shall be entitled to purchase such greater number of shares at the
lowest price at which such shares may then be validly issued under applicable
law. Such exercise shall not constitute a waiver of any claim arising against
the Issuer by reason of its default under Section 3 of this Warrant.

                  (f) Form of Warrant after Adjustments. The form of this
Warrant need not be changed because of any adjustments in the Warrant Price or
the number and kind of Securities purchasable upon the exercise of this Warrant.

         5. Notice of Adjustments. Whenever the Warrant Price or Warrant Share
Number shall be adjusted pursuant to Section 4 hereof (for purposes of this
Section 5, each an "adjustment"), the Issuer shall compute such adjustment and
prepare and execute a certificate setting forth, in reasonable detail, the event
requiring the adjustment, the amount of the adjustment, the method by which such
adjustment was calculated (including a description of the basis on which the
Board made any determination hereunder), and the Warrant Price and Warrant Share
Number after giving effect to such adjustment, and shall cause copies of such
certificate to be delivered to the Holder of this Warrant promptly after each
adjustment.

         6. Fractional Shares. No fractional shares of Warrant Stock will be
issued in connection with and exercise hereof, but in lieu of such fractional
shares, the Issuer shall make a cash payment therefor equal in amount to the
product of the applicable fraction multiplied by the Fair Market Value then in
effect.

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         7. Definitions. For the purposes of this Warrant, the following terms
have the following meanings:

         "Additional Shares of Common Stock" means all shares of Common Stock
issued by the Issuer after the Original Issue Date, and all shares of Other
Common, if any, issued by the Issuer after the Original Issue Date, except the
Warrant Stock and shares of Common Stock issued upon the exercise of warrants
and options outstanding on the date hereof.

         "Adjustment" shall have the meaning ascribed to it in Section 5 hereof.

         "Articles of Incorporation" means the Articles of Incorporation of the
Issuer as in effect on the Original Issue Date, and as hereafter from time to
time amended, modified, supplemented or restated in accordance with the terms
hereof and thereof and pursuant to applicable law.

         "Board" shall mean the Board of Directors of the Issuer.

         "Capital Stock" means and includes (i) any and all shares, interests,
participations or other equivalents of or interests in (however designated)
corporate stock, including, without limitation, shares of preferred or
preference stock, (ii) all partnership interests (whether general or limited) in
any Person which is a partnership, (iii) all membership interests or limited
liability company interests in any limited liability company, and (iv) all
equity or ownership interests in any Person of any other type.

         "Common Stock" means the Common Stock, without par value per share, of
the Issuer and any other Capital Stock into which such stock may hereafter be
changed.

         "Common Stock Equivalent" means any Convertible Security or warrant,
option or other right to subscribe for or purchase any Additional Shares of
Common Stock or any Convertible Security.

         "Convertible Securities" means evidences of Indebtedness, shares of
Capital Stock or other Securities which are or may be at any time convertible
into or exchangeable for Additional Shares of Common Stock. The term
"Convertible Security" means one of the Convertible Securities.

         "Fair Market Value" means on any particular date (a) the closing bid
price per share of the Common Stock on such date on The Nasdaq National Market,
The Nasdaq SmallCap Market or other registered national stock exchange on which
the Common Stock is then listed or if there is no such price on such date, then
the closing bid price on such exchange or quotation system on the date nearest
preceding such date, or (b) if the Common Stock is not listed then on The Nasdaq
National Market, The Nasdaq SmallCap Market or any registered national stock
exchange, the closing bid price for a share of Common Stock as reported by
NASDAQ or in the National Quotation Bureau Incorporated or similar organization
or agency succeeding to its functions of reporting prices) at the close of
business on such date, or (c) if the Common Stock is not then reported by NASDAQ
or the National Quotation Bureau Incorporated (or similar organization or agency
succeeding to its functions of reporting prices), then the average of the "Pink
Sheet" quotes for the relevant period, as determined in good faith by the
holder, or (d) if the Common Stock is not then publicly traded the fair market
value of a share of Common Stock as determined by an Independent Appraiser
selected by the Issuer; provided, however that all determinations of the Fair
Market Value shall be appropriately adjusted for any stock dividends, stock
splits or other similar transactions during such period. The determination of
fair market value by an Independent Appraiser shall be based upon the fair
market value of the Issuer determined on a going concern basis as between a
willing buyer and a willing seller and taking into account all relevant factors
determinative of value, and shall be final and binding on all

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parties. In determining the fair market value of any shares of Common Stock, no
consideration shall be given to any restrictions on transfer of the Common Stock
imposed by agreement or by federal or state securities laws, or to the existence
or absence of, or any limitations on, voting rights.

         "Governmental Authority" means any governmental, regulatory or
self-regulatory entity, department, body, official, authority, commission,
board, agency or instrumentality, whether federal, state or local, and whether
domestic or foreign.

         "Holder" means Samuel P. Sears, Jr.

         "Independent Appraiser" means a nationally recognized or major regional
investment banking firm or firm of independent certified public accountants of
recognized standing (which may be the firm that regularly examines the financial
statements of the Issuer) that is regularly engaged in the business of
appraising the Capital Stock or assets of corporations or other entities as
going concerns, and which is not affiliated with either the Issuer or the Holder
of any Warrant.

         "Investor" shall have the meaning ascribed to it in the recitals of
this Warrant.

         "Issuer" means Commonwealth Biotechnologies, Inc., a Virginia
corporation, and its successors.

         "NASDAQ" means the National Association of Securities Dealers Automated
Quotation System.

         "Original Issue Date" means August 30, 2002.

         "Other Common" means any other Capital Stock of the Issuer of any class
which shall be authorized at any time after the date of this Warrant (other than
Common Stock) and which shall have the right to participate in the distribution
of earnings and assets of the Issuer without limitation as to amount.

         "Person" means an individual, corporation, limited liability company,
partnership, joint stock company, trust, unincorporated organization, joint
venture, Governmental Authority or other entity of whatever nature.

         "Purchase Agreement" shall mean that certain Common Stock and Warrant
Purchase Agreement, dated as of August 1, 2002, by and among the Issuer and the
purchasers indicated on Exhibit A thereto.

         "Securities" means any debt or equity securities of the Issuer, whether
now or hereafter authorized, any instrument convertible into or exchangeable for
Securities or a Security, and any option, warrant or other right to purchase or
acquire any Security. "Security" means one of the Securities.

         "Securities Act" means the Securities Act of 1933, as amended, or any
similar federal statute then in effect.

         "Subsidiary" means any corporation at least 50% of whose outstanding
Voting Stock shall at the time be owned directly orindirectly by the Issuer or
by one or more of its Subsidiaries, or by the Issuer and one or more of its
Subsidiaries.

         "Term" has the meaning specified in Section 1 hereof.

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         "Triggering Event" shall have the meaning ascribed to it in Section
4(a)(i) hereof.

         "Voting Stock", as applied to the Capital Stock of any corporation,
means Capital Stock of any class or classes (however designated) having ordinary
voting power for the election of a majority of the members of the Board of
Directors (or other governing body) of such corporation, other than Capital
Stock having such power only by reason of the happening of a contingency.

         "Warrants" means the Warrants issued and sold pursuant to the Purchase
Agreement, including, without limitation, this Warrant, and any other warrants
of like tenor issued in substitution or exchange for any thereof pursuant to the
provisions of Section 2(c), 2(d) or 2(e) hereof or of any of such other
Warrants.

         "Warrant Price" means initially $0.90.

         "Warrant Share Number" means at any time the aggregate number of shares
of Warrant Stock which may at such time be purchased upon exercise of this
Warrant, after giving effect to all prior adjustments and increases to such
number made or required to be made under the terms hereof.

         "Warrant Stock" means Common Stock issuable upon exercise of this
Warrant.

         9. Other Notices. In case at any time:

            (a) the Issuer shall make any distributions to the holders of
Common Stock; or

            (b) the Issuer shall authorize the granting to all holders of its
Common Stock of rights to subscribe for or purchase any shares of Capital Stock
of any class or of any Common Stock Equivalents or Convertible Securities or
other rights; or

            (c) there shall be any reclassification of the Capital Stock of the
Issuer; or

            (d) there shall be any capital reorganization by the Issuer; or

            (e) there shall be any (i) consolidation or merger involving the
Issuer or (ii) sale, transfer or other disposition of all or substantially all
of the Issuer's property, assets or business (except a merger or other
reorganization in which the Issuer shall be the surviving corporation and its
shares of Capital Stock shall continue to be outstanding and unchanged and
except a consolidation, merger, sale, transfer or other disposition involving a
wholly-owned Subsidiary); or

            (f) there shall be a voluntary or involuntary dissolution,
liquidation or winding-up of the Issuer or any partial liquidation of the Issuer
or distribution to holders of Common Stock;

then, in each of such cases, the Issuer shall give written notice to the Holder
of the date on which (i) the books of the Issuer shall close or a record shall
be taken for such dividend, distribution or subscription rights or (ii) such
reorganization, reclassification, consolidation, merger, disposition,
dissolution, liquidation or winding-up, as the case may be, shall take place.
Such notice also shall specify the date as of which the holders of Common Stock
of record shall participate in such dividend, distribution or subscription
rights, or shall be entitled to exchange their certificates for Common Stock for
securities or other property deliverable upon such reorganization,
reclassification, consolidation, merger, disposition, dissolution, liquidation
or winding-up, as the case may be. Such notice shall be given at least twenty
days prior to the action in question and

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not less than twenty days prior to the record date or the date on which the
Issuer's transfer books are closed in respect thereto.

         10. Amendment and Waiver. Any term, covenant, agreement or condition in
this Warrant may be amended, or compliance therewith may be waived (either
generally or in a particular instance and either retroactively or
prospectively), by a written instrument or written instruments executed by the
Issuer and the Holder; provided, however, that no such amendment or waiver shall
reduce the Warrant Share Number, increase the Warrant Price, shorten the period
during which this Warrant may be exercised or modify any provision of this
Section 10 without the consent of the Holder of this Warrant.

         11. Governing Law. THIS WARRANT SHALL BE GOVERNED BY AND CONSTRUED IN
ACCORDANCE WITH THE LAWS OF THE COMMONWEALTH OF VIRGINIA, WITHOUT GIVING EFFECT
TO PRINCIPLES OF CONFLICTS OF LAW.

         12. Notices. Any and all notices or other communications or deliveries
required or permitted to be provided hereunder shall be in writing and shall be
deemed given and effective on the earlier of (i) the date of transmission, if
such notice or communication is delivered via facsimile at the facsimile
telephone number specified for notice prior to 5:00 p.m., eastern standard time,
on a Business Day, (ii) the Business Day after the date of transmission, if such
notice or communication is delivered via facsimile at the facsimile telephone
number specified for notice later than 5:00 p.m., eastern standard time, on any
date and earlier than 11:59 p.m., eastern standard time, on such date, (iii) the
Business Day following the date of mailing, if sent by nationally recognized
overnight courier service or (iv) actual receipt by the party to whom such
notice is required to be given. The addresses for such communications shall be
with respect to the Holder of this Warrant or of Warrant Stock issued pursuant
hereto, addressed to such Holder at its last known address or facsimile number
appearing on the books of the Issuer maintained for such purposes, or with
respect to the Issuer, addressed to: Commonwealth Biotechnologies, Inc., 601
Biotech Drive, Richmond, Virginia 23235 Attention: Robert B. Harris, Ph.D.,
President and Chief Executive Officer or to such other address or addresses or
facsimile number or numbers as any such party may most recently have designated
in writing to the other parties hereto by such notice.

         13. Warrant Agent. The Issuer may, by written notice to each Holder of
this Warrant, appoint an agent for the purpose of issuing shares of Warrant
Stock on the exercise of this Warrant pursuant to subsection (b) of Section 2
hereof, exchanging this Warrant pursuant to subsection (d) of Section 2 hereof
or replacing this Warrant pursuant to subsection (d) of Section 3 hereof, or any
of the foregoing, and thereafter any such issuance, exchange or replacement, as
the case may be, shall be made at such office by such agent.

         14. Remedies. The Issuer stipulates that the remedies at law of the
Holder of this Warrant in the event of any default or threatened default by the
Issuer in the performance of or compliance with any of the terms of this Warrant
are not and will not be adequate and that, to the fullest extent permitted by
law, such terms may be specifically enforced by a decree for the specific
performance of any agreement contained herein or by an injunction against a
violation of any of the terms hereof or otherwise.

         15. Successors and Assigns. This Warrant and the rights evidenced
hereby shall inure to the benefit of and be binding upon the successors and
assigns of the Issuer, the Holder hereof and shall be enforceable by any such
Holder.

         16. Modification and Severability. If, in any action before any court
or agency legally empowered to enforce any provision contained herein, any
provision hereof is found to be unenforceable, then such provision shall be
deemed modified to the extent necessary to make

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it enforceable by such court or agency. If any such provision is not enforceable
as set forth in the preceding sentence, the unenforceability of such provision
shall not affect the other provisions of this Warrant, but this Warrant shall be
construed as if such unenforceable provision had never been contained herein.

         17. Headings. The headings of the Sections of this Warrant are for
convenience of reference only and shall not, for any purpose, be deemed a part
of this Warrant.

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         IN WITNESS WHEREOF, the Issuer has executed this Warrant as of the day
and year first above written.

                                      COMMONWEALTH BIOTECHNOLOGIES, INC.

                                      By:  /s/ Robert B. Harris, Ph.D.
                                           -------------------------------------
                                           President and Chief Executive Officer

                                       11

<PAGE>

                                  EXERCISE FORM

                                        , pursuant to the provisions of the
---------------------------------------
within Warrant, hereby elects to purchase        shares of Common Stock of
                                          ------
Commonwealth Biotechnologies, Inc. covered by the within Warrant.

Dated:
       ----------------------------------------------
Signature:
           ------------------------------------------
 Address:
          -------------------------------------------

FOR USE BY THE ISSUER ONLY:         This Warrant No. SW-     canceled (or
                                                         ---
transferred or exchanged) this       day of            ,     , shares of Common
                               -----        -----------  ----
Stock issued therefor in the name of                             , Warrant
                                     ----------------------------
No. SW-    issued for         shares of Common Stock in the name of
       ---            -------

-------------------------.

                                       12<PAGE>
                                                                  Exhibit 10.3

THIS WARRANT AND THE SHARES OF COMMON STOCK ISSUABLE UPON EXERCISE HEREOF HAVE
NOT BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933, AS AMENDED (THE
"SECURITIES ACT"), OR ANY STATE SECURITIES LAWS AND MAY NOT BE SOLD, TRANSFERRED
OR OTHERWISE DISPOSED OF UNLESS REGISTERED UNDER THE SECURITIES ACT AND UNDER
APPLICABLE STATE SECURITIES LAWS OR COMMONWEALTH BIOTECHNOLOGIES, INC. SHALL
HAVE RECEIVED AN OPINION OF ITS COUNSEL THAT REGISTRATION OF SUCH SECURITIES
UNDER THE SECURITIES ACT AND UNDER THE PROVISIONS OF APPLICABLE STATE SECURITIES
LAWS IS NOT REQUIRED.

                           WARRANT TO PURCHASE SHARES

                               OF COMMON STOCK OF

                       COMMONWEALTH BIOTECHNOLOGIES, INC.

                             Expires August 29, 2007

No.: SW-4

Number of Shares: 2,222

Date of Issuance: August 30, 2002
         FOR VALUE RECEIVED, subject to the provisions hereinafter set forth,
the undersigned, COMMONWEALTH BIOTECHNOLOGIES, INC., a Virginia corporation
(together with its successors and assigns, the "Issuer"), hereby certifies that
Richard J. Freer, Ph.D. (the "Investor") or its registered assigns is entitled
to subscribe for and purchase, during the period specified in this Warrant, up
to 2,222 shares (subject to adjustment as hereinafter provided) of the duly
authorized, validly issued, fully paid and non-assessable shares of Common Stock
of the Issuer, at an exercise price per share equal to the Warrant Price then in
effect, subject, however, to the provisions and upon the terms and conditions
hereinafter set forth. Capitalized terms used in this Warrant and not otherwise
defined herein shall have the respective meanings specified in Section 8 hereof.

     1. Term. The right to subscribe for and purchase shares of Warrant Stock
represented hereby shall commence on August 30, 2002, and shall expire at 5:00
p.m., eastern time, on August 29, 2007 (such period being the "Term").

     2. Method of Exercise Payment; Issuance of New Warrant; Transfer and
Exchange.

        (a) Time of Exercise. The purchase rights represented by this Warrant
may be exercised in whole or in part at any time and from time to time during
the Term.

                                       1

<PAGE>
..

        (b) Method of Exercise. This Warrant may be exercised at any time or
from time to time during the Term by surrendering it at the principal office of
the Issuer, at 601 Biotech Drive, Richmond, Virginia 23235, with the
subscription form duly executed, together with payment in an amount equal to the
Warrant Price in effect on the date of such exercise multiplied by the number of
shares of Warrant Stock with respect to which this Warrant is then being
exercised. Payment of this amount may be made (i) by payment in cash or by
corporate check, payable to the order of the Issuer, or (ii) by the Issuer not
issuing that number of shares of Warrant Stock having an aggregate Fair Market
Value equal to such sum, as the Investor may determine. This Warrant may be
exercised for less than the full number of shares of Warrant Stock at the time
called for hereby, except that the number of shares of Warrant Stock receivable
upon exercise of this Warrant as a whole, and the aggregate Warrant Price, shall
be proportionately reduced.

        (c) Issuance of Stock Certificates. In the event of any exercise of the
rights represented by this Warrant in accordance with and subject to the terms
and conditions hereof, (i) certificates for the shares of Warrant Stock so
purchased shall be dated the date of such exercise and delivered to the Holder
hereof within a reasonable time after such exercise, and the Holder hereof shall
be deemed for all purposes to be the Holder of the shares of Warrant Stock so
purchased as of the date of such exercise, and (ii) unless this Warrant has
expired, a new Warrant representing the number of shares of Warrant Stock, if
any, with respect to which this Warrant shall not then have been exercised shall
also be issued to the Holder hereof at the Issuer's expense within such time.

        (d) Transferability of Warrant. Subject to Section 2(e), this Warrant
may not be transferred by a Purchaser without the consent of the Issuer, which
consent shall not be unnecessarily withheld. If transferred pursuant to this
paragraph with the consent of the Issuer and subject to the provisions of
subsection (e) of this Section 2, this Warrant may be transferred on the books
of the Issuer by the Holder hereof in person or by duly authorized attorney,
upon surrender of this Warrant at the principal office of the Issuer, properly
endorsed and upon payment of any necessary transfer tax or other governmental
charge imposed upon such transfer. This Warrant is exchangeable at the principal
office of the Issuer for Warrants for the purchase of the same aggregate number
of shares of Warrant Stock, each new Warrant to represent the right to purchase
such number of shares of Warrant Stock as the Holder hereof shall designate at
the time of such exchange. All Warrants issued on transfers or exchanges shall
be dated the Original Issue Date and shall be identical with this Warrant except
as to the number of shares of Warrant Stock issuable pursuant hereto.

        (e)      Compliance with Securities Laws.

                 (i) The Holder of this Warrant, by acceptance hereof,
acknowledges that this Warrant and the shares of Warrant Stock to be issued upon
exercise hereof are being acquired solely for the Holder's own account and not
as a nominee for any other party, and for investment, and that the Holder will
not offer, sell or otherwise dispose of this Warrant or any shares of Warrant
Stock to be issued upon exercise hereof except pursuant to an effective
registration statement, or an exemption from registration, under the Securities
Act and any applicable state securities laws.

        (ii) Except as provided in paragraph (iii) below, this Warrant and all
certificates representing shares of Warrant Stock issued upon exercise hereof
shall be stamped or imprinted with a legend in substantially the following form:

                                       2

<PAGE>

THIS WARRANT AND THE SHARES OF COMMON STOCK ISSUABLE UPON EXERCISE HEREOF HAVE
NOT BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933, AS AMENDED (THE
"SECURITIES ACT"), OR ANY STATE SECURITIES LAWS AND MAY NOT BE SOLD, TRANSFERRED
OR OTHERWISE DISPOSED OF UNLESS REGISTERED UNDER THE SECURITIES ACT AND UNDER
APPLICABLE STATE SECURITIES LAWS OR COMMONWEALTH BIOTECHNOLOGIES, INC. SHALL
HAVE RECEIVED AN OPINION OF ITS COUNSEL THAT REGISTRATION OF SUCH SECURITIES
UNDER THE SECURITIES ACT AND UNDER THE PROVISIONS OF APPLICABLE STATE SECURITIES
LAWS IS NOT REQUIRED.

                 (iii) The restrictions imposed by this subsection (e) upon the
transfer of this Warrant or the shares of Warrant Stock to be purchased upon
exercise hereof shall terminate (A) when such securities shall have been resold
pursuant to being effectively registered under the Securities Act, (B) upon the
Issuer's receipt of an opinion of counsel, in form and substance reasonably
satisfactory to the Issuer, addressed to the Issuer to the effect that such
restrictions are no longer required to ensure compliance with the Securities Act
and state securities laws or (C) upon the Issuer's receipt of other evidence
reasonably satisfactory to the Issuer that such registration and qualification
under state securities laws is not required; provided, that the restrictions
imposed by the last sentence of the legend with respect to the transfer of this
Warrant shall not terminate. Whenever such restrictions shall cease and
terminate as to any such securities, the Holder thereof shall be entitled to
receive from the Issuer (or its transfer agent and registrar), without expense
(other than applicable transfer taxes, if any), new Warrants (or, in the case of
shares of Warrant Stock, new stock certificates) of like tenor not bearing the
applicable legend required by paragraph (ii) above relating to the Securities
Act and state securities laws.

        3. Stock Fully Paid; Reservation; Covenants.

                 (a) Stock Fully Paid. The Issuer represents, warrants,
covenants and agrees that all shares of Warrant Stock which may be issued upon
the exercise of this Warrant or otherwise hereunder will, upon issuance, be duly
authorized, validly issued, fully paid and non-assessable and free from all
taxes, liens and charges created by or through the Issuer.

                 (b) Reservation. The Issuer further covenants and agrees that
during the period within which this Warrant may be exercised, the Issuer will at
all times have authorized and reserved for the purpose of the issue upon
exercise of this Warrant a sufficient number of shares of Common Stock to
provide for the exercise of this Warrant.

                 (c) Covenants. The Issuer shall not by any action including,
without limitation, amending the Articles of Incorporation or the bylaws of the
Issuer, or through any reorganization, transfer of assets, consolidation,
merger, dissolution, issue or sale of securities or any other action, avoid or
seek to avoid the observance or performance of any of the terms of this Warrant,
but will at all times in good faith assist in the carrying out of all such terms
and in the taking of all such actions as may be necessary or appropriate to
protect the rights of the Holder hereof against dilution (to the extent
specifically provided herein) or impairment. Without limiting the generality of
the foregoing, the Issuer will (i) not permit the par value, if any, of its
Common Stock to exceed the then effective Warrant Price and (ii) take all such
action as may be reasonably necessary in order that the Issuer may validly and
legally issue fully paid and nonassessable shares of Common Stock, free and
clear of any liens, claims, encumbrances and restrictions (other than as
provided herein) upon the exercise of this Warrant.

                 (d) Loss, Theft, Destruction of Warrants. Upon receipt of
evidence satisfactory to the Issuer of the ownership of and the loss, theft,
destruction or mutilation of any Warrant and, in the case of any such loss,
theft or destruction, upon receipt of indemnity or security satisfactory to the
Issuer or, in the case of any such mutilation, upon surrender and

                                       3

<PAGE>

cancellation of such Warrant, the Issuer will make and deliver, in lieu of such
lost, stolen, destroyed or mutilated Warrant, a new Warrant of like tenor and
representing the right to purchase the same number of shares of Common Stock.

        4. Adjustment of Warrant Price and Warrant Share Number. The number and
kind of Securities purchasable upon the exercise of this Warrant and the Warrant
Price shall be subject to adjustment from time to time upon the happening of
certain events as follows:

                 (a) Recapitalization, Reorganization, Reclassification,
Consolidation, Merger or Sale.

                     (i) In case the Issuer after the Original Issue Date shall
do any of the following (each, a "Triggering Event"): (a) consolidate with or
merge into any other Person and the Issuer shall not be the continuing or
surviving corporation of such consolidation or merger, or (b) permit any other
Person to consolidate with or merge into the Issuer and the Issuer shall be the
continuing or surviving Person but, in connection with such consolidation or
merger, any Capital Stock of the Issuer shall be changed into or exchanged for
Securities of any other Person or cash or any other property, or (c) transfer
all or substantially all of its properties or assets to any other Person, or (d)
effect a capital reorganization or reclassification of its Capital Stock, then,
and in the case of each such Triggering Event, proper provision shall be made so
that, upon the basis and the terms and in the manner provided in this Warrant,
the Holder of this Warrant shall be entitled upon the exercise hereof at any
time after the consummation of such Triggering Event, to the extent this Warrant
is not exercised prior to such Triggering Event, to receive at the Warrant Price
in effect at the time immediately prior to the consummation of such Triggering
Event in lieu of the Common Stock issuable upon such exercise of this Warrant
prior to such Triggering Event, the Securities, cash and property to which such
Holder would have been entitled upon the consummation of such Triggering Event
if such Holder had exercised the rights represented by this Warrant immediately
prior thereto, subject to adjustments (subsequent to such corporate action) as
nearly equivalent as possible to the adjustments provided for in Section 4.

                 (ii) Notwithstanding anything contained in this Warrant to the
contrary, the Issuer will not effect any Triggering Event unless, prior to the
consummation thereof, each Person (other than the Issuer) which may be required
to deliver any Securities, cash or property upon the exercise of this Warrant
as provided herein shall assume, by written instrument delivered to, and
reasonably satisfactory to, the Holder of this Warrant, (A) the obligations of
the Issuer under this Warrant (and if the Issuer shall survive the consummation
of such Triggering Event, such assumption shall be in addition to, and shall not
release the Issuer from, any continuing obligations of the Issuer under this
Warrant) and (B) the obligation to deliver to such Holder such shares of
Securities, cash or property as, in accordance with the foregoing provisions of
this subsection (a), such Holder shall be entitled to receive.

                 (b) Subdivision or Combination of Shares. If the Issuer, at
any time while this Warrant is outstanding, shall subdivide or combine any
shares of Common Stock, (i) in case of subdivision of shares, the Warrant Price
shall be proportionately reduced (as at the effective date of such subdivision
or, if the Issuer shall take a record of Holders of its Common Stock for the
purpose of so subdividing, as at the applicable record date, whichever is
earlier) to reflect the increase in the total number of shares of Common Stock
outstanding as a result of such subdivision, or (ii) in the case of a
combination of shares, the Warrant Price shall be proportionately increased (as
at the effective date of such combination or, if the Issuer shall take a record
of Holders of its Common Stock for the purpose of so combining, as at the
applicable record date, whichever is earlier) to reflect the reduction in the
total number of shares of Common Stock outstanding as a result of such
combination.

                                       4

<PAGE>

                 (c) Certain Dividends and Distributions. If the Issuer, at any
time while this Warrant is outstanding, shall pay a dividend in, or make any
other distribution to its stockholders (without consideration therefor) of,
shares of Common Stock, the Warrant Price shall be adjusted, as at the 6 date
the Issuer shall take a record of the Holders of the Issuer's Capital Stock for
the purpose of receiving such dividend or other distribution (or if no such
record is taken, as at the date of such payment or other distribution), to that
price determined by multiplying the Warrant Price in effect immediately prior to
such record date (or if no such record is taken, then immediately prior to such
payment or other distribution), by a fraction (1) the numerator of which shall
be the total number of shares of Common Stock outstanding immediately prior to
such record date (or if no such record date is taken, then immediately prior to
such dividend or distribution), and (2) the denominator of which shall be such
number of shares plus the total number of shares of Common Stock constituting
such dividend or distribution.

                 (d) Other Action Affecting Common Stock. In case after the
Original Issue Date the Issuer shall take any action affecting its Common Stock,
other than an action described in any of the foregoing subsections (a) through
(f) of this Section 4, inclusive, and the failure to make any adjustment would
not fairly protect the purchase rights represented by this Warrant in accordance
with the essential intent and principle of this Section 4, then the Warrant
Price shall be adjusted in such manner and at such time as the Board may in good
faith determine to be equitable in the circumstances.

                 (e) Adjustment of Warrant Share Number. Upon each adjustment in
the Warrant Price pursuant to any of the foregoing provisions of this Section 4,
the Warrant Share Number shall be adjusted, to the nearest one hundredth of a
whole share, to the product obtained by multiplying the Warrant Share Number
immediately prior to such adjustment in the Warrant Price by a fraction, the
numerator of which shall be the Warrant Price immediately before giving effect
to such adjustment and the denominator of which shall be the Warrant Price
immediately after giving effect to such adjustment. If the Issuer shall be in
default under any provision contained in Section 3 of this Warrant so that
shares issued at the Warrant Price adjusted in accordance with this Section 4
would not be validly issued, the adjustment of the Warrant Share Number provided
for in the foregoing sentence shall nonetheless be made and the Holder of this
Warrant shall be entitled to purchase such greater number of shares at the
lowest price at which such shares may then be validly issued under applicable
law. Such exercise shall not constitute a waiver of any claim arising against
the Issuer by reason of its default under Section 3 of this Warrant.

                 (f) Form of Warrant after Adjustments. The form of this
Warrant need not be changed because of any adjustments in the Warrant Price or
the number and kind of Securities purchasable upon the exercise of this Warrant.

         5. Notice of Adjustments. Whenever the Warrant Price or Warrant Share
Number shall be adjusted pursuant to Section 4 hereof (for purposes of this
Section 5, each an "adjustment"), the Issuer shall compute such adjustment and
prepare and execute a certificate setting forth, in reasonable detail, the event
requiring the adjustment, the amount of the adjustment, the method by which such
adjustment was calculated (including a description of the basis on which the
Board made any determination hereunder), and the Warrant Price and Warrant Share
Number after giving effect to such adjustment, and shall cause copies of such
certificate to be delivered to the Holder of this Warrant promptly after each
adjustment.

         6. Fractional Shares. No fractional shares of Warrant Stock will be
issued in connection with and exercise hereof, but in lieu of such fractional
shares, the Issuer shall make a cash payment therefor equal in amount to the
product of the applicable fraction multiplied by the Fair Market Value then in
effect.

                                       5

<PAGE>

         7.       Definitions. For the purposes of this Warrant, the following
 terms have the following meanings:

         "Additional Shares of Common Stock" means all shares of Common Stock
issued by the Issuer after the Original Issue Date, and all shares of Other
Common, if any, issued by the Issuer after the Original Issue Date, except the
Warrant Stock and shares of Common Stock issued upon the exercise of warrants
and options outstanding on the date hereof.

         "Adjustment" shall have the meaning ascribed to it in Section 5 hereof.

         "Articles of Incorporation" means the Articles of Incorporation of the
Issuer as in effect on the Original Issue Date, and as hereafter from time to
time amended, modified, supplemented or restated in accordance with the terms
hereof and thereof and pursuant to applicable law.

         "Board" shall mean the Board of Directors of the Issuer.

         "Capital Stock" means and includes (i) any and all shares, interests,
participations or other equivalents of or interests in (however designated)
corporate stock, including, without limitation, shares of preferred or
preference stock, (ii) all partnership interests (whether general or limited) in
any Person which is a partnership, (iii) all membership interests or limited
liability company interests in any limited liability company, and (iv) all
equity or ownership interests in any Person of any other type.

         "Common Stock" means the Common Stock, without par value per share, of
the Issuer and any other Capital Stock into which such stock may hereafter be
changed.

         "Common Stock Equivalent" means any Convertible Security or warrant,
option or other right to subscribe for or purchase any Additional Shares of
Common Stock or any Convertible Security.

         "Convertible Securities" means evidences of Indebtedness, shares of
Capital Stock or other Securities which are or may be at any time convertible
into or exchangeable for Additional Shares of Common Stock. The term
"Convertible Security" means one of the Convertible Securities.

         "Fair Market Value" means on any particular date (a) the closing bid
price per share of the Common Stock on such date on The Nasdaq National Market,
The Nasdaq SmallCap Market or other registered national stock exchange on which
the Common Stock is then listed or if there is no such price on such date, then
the closing bid price on such exchange or quotation system on the date nearest
preceding such date, or (b) if the Common Stock is not listed then on The Nasdaq
National Market, The Nasdaq SmallCap Market or any registered national stock
exchange, the closing bid price for a share of Common Stock as reported by
NASDAQ or in the National Quotation Bureau Incorporated or similar organization
or agency succeeding to its functions of reporting prices) at the close of
business on such date, or (c) if the Common Stock is not then reported by NASDAQ
or the National Quotation Bureau Incorporated (or similar organization or agency
succeeding to its functions of reporting prices), then the average of the "Pink
Sheet" quotes for the relevant period, as determined in good faith by the
holder, or (d) if the Common Stock is not then publicly traded the fair market
value of a share of Common Stock as determined by an Independent Appraiser
selected by the Issuer; provided, however that all determinations of the Fair
Market Value shall be appropriately adjusted for any stock dividends, stock
splits or other similar transactions during such period. The determination of
fair market value by an Independent Appraiser shall be based upon the fair
market value of the Issuer determined on a going concern basis as between a
willing buyer and a willing seller and taking into account all relevant factors
determinative of value, and shall be final and binding on all

                                       6

<PAGE>

parties. In determining the fair market value of any shares of Common Stock, no
consideration shall be given to any restrictions on transfer of the Common Stock
imposed by agreement or by federal or state securities laws, or to the existence
or absence of, or any limitations on, voting rights.

         "Governmental Authority" means any governmental, regulatory or
self-regulatory entity, department, body, official, authority, commission,
board, agency or instrumentality, whether federal, state or local, and whether
domestic or foreign.

         "Holder" means Richard J. Freer, Ph.D.

         "Independent Appraiser" means a nationally recognized or major regional
investment banking firm or firm of independent certified public accountants of
recognized standing (which may be the firm that regularly examines the financial
statements of the Issuer) that is regularly engaged in the business of
appraising the Capital Stock or assets of corporations or other entities as
going concerns, and which is not affiliated with either the Issuer or the Holder
of any Warrant.

         "Investor" shall have the meaning ascribed to it in the recitals of
this Warrant.

         "Issuer" means Commonwealth Biotechnologies, Inc., a Virginia
corporation, and its successors.

         "NASDAQ" means the National Association of Securities Dealers Automated
 Quotation System.

         "Original Issue Date" means August 30, 2002.

         "Other Common" means any other Capital Stock of the Issuer of any class
which shall be authorized at any time after the date of this Warrant (other than
Common Stock) and which shall have the right to participate in the distribution
of earnings and assets of the Issuer without limitation as to amount.

         "Person" means an individual, corporation, limited liability company,
partnership, joint stock company, trust, unincorporated organization, joint
venture, Governmental Authority or other entity of whatever nature.

         "Purchase Agreement" shall mean that certain Common Stock and Warrant
Purchase Agreement, dated as of August 1, 2002, by and among the Issuer and the
purchasers indicated on Exhibit A thereto.

         "Securities" means any debt or equity securities of the Issuer, whether
now or hereafter authorized, any instrument convertible into or exchangeable for
Securities or a Security, and any option, warrant or other right to purchase or
acquire any Security. "Security" means one of the Securities.

         "Securities Act" means the Securities Act of 1933, as amended, or any
similar federal statute then in effect.

         "Subsidiary" means any corporation at least 50% of whose outstanding
Voting Stock shall at the time be owned directly or indirectly by the Issuer or
by one or more of its Subsidiaries, or by the Issuer and one or more of its
Subsidiaries.

         "Term" has the meaning specified in Section 1 hereof.

                                       7

<PAGE>

         "Triggering Event" shall have the meaning ascribed to it in Section
4(a)(i) hereof.

         "Voting Stock", as applied to the Capital Stock of any corporation,
means Capital Stock of any class or classes (however designated) having ordinary
voting power for the election of a majority of the members of the Board of
Directors (or other governing body) of such corporation, other than Capital
Stock having such power only by reason of the happening of a contingency.

         "Warrants" means the Warrants issued and sold pursuant to the Purchase
Agreement, including, without limitation, this Warrant, and any other warrants
of like tenor issued in substitution or exchange for any thereof pursuant to the
provisions of Section 2(c), 2(d) or 2(e) hereof or of any of such other
Warrants.

         "Warrant Price" means initially $0.90.

         "Warrant Share Number" means at any time the aggregate number of shares
of Warrant Stock which may at such time be purchased upon exercise of this
Warrant, after giving effect to all prior adjustments and increases to such
number made or required to be made under the terms hereof.

         "Warrant Stock" means Common Stock issuable upon exercise of this
 Warrant.

         9. Other Notices. In case at any time:
                  (a)      the Issuer shall make any distributions to the
 holders of Common Stock; or

                  (b) the Issuer shall authorize the granting to all holders of
its Common Stock of rights to subscribe for or purchase any shares of Capital
Stock of any class or of any Common Stock Equivalents or Convertible Securities
or other rights; or

                  (c)      there shall be any reclassification of the Capital
 Stock of the Issuer; or

                  (d)      there shall be any capital reorganization by the
Issuer; or

                  (e)      there shall be any (i) consolidation or merger
involving the Issuer or (ii) sale, transfer or other disposition of all or
substantially all of the Issuer's property, assets or business (except a merger
or other reorganization in which the Issuer shall be the surviving corporation
and its shares of Capital Stock shall continue to be outstanding and unchanged
and except a consolidation, merger, sale, transfer or other disposition
involving a wholly-owned Subsidiary); or

                  (f) there shall be a voluntary or involuntary dissolution,
liquidation or winding-up of the Issuer or any partial liquidation of the Issuer
or distribution to holders of Common Stock;

then, in each of such cases, the Issuer shall give written notice to the Holder
of the date on which (i) the books of the Issuer shall close or a record shall
be taken for such dividend, distribution or subscription rights or (ii) such
reorganization, reclassification, consolidation, merger, disposition,
dissolution, liquidation or winding-up, as the case may be, shall take place.
Such notice also shall specify the date as of which the holders of Common Stock
of record shall participate in such dividend, distribution or subscription
rights, or shall be entitled to exchange their certificates for Common Stock for
securities or other property deliverable upon such reorganization,
reclassification, consolidation, merger, disposition, dissolution, liquidation
or winding-up, as the case may be. Such notice shall be given at least twenty
days prior to the action in question and

                                       8

<PAGE>

not less than twenty days prior to the record date or the date on which the
Issuer's transfer books are closed in respect thereto.

         10. Amendment and Waiver. Any term, covenant, agreement or condition in
this Warrant may be amended, or compliance therewith may be waived (either
generally or in a particular instance and either retroactively or prospectively)
, by a written instrument or written instruments executed by the Issuer and the
Holder; provided, however, that no such amendment or waiver shall reduce the
Warrant Share Number, increase the Warrant Price, shorten the period during
which this Warrant may be exercised or modify any provision of this Section 10
without the consent of the Holder of this Warrant.

         11. Governing Law. THIS WARRANT SHALL BE GOVERNED BY AND CONSTRUED
IN ACCORDANCE WITH THE LAWS OF THE COMMONWEALTH OF VIRGINIA, WITHOUT GIVING
EFFECT TO PRINCIPLES OF CONFLICTS OF LAW.

         12. Notices. Any and all notices or other communications or deliveries
required or permitted to be provided hereunder shall be in writing and shall be
deemed given and effective on the earlier of (i) the date of transmission, if
such notice or communication is delivered via facsimile at the facsimile
telephone number specified for notice prior to 5:00 p.m., eastern standard time,
on a Business Day, (ii) the Business Day after the date of transmission, if such
notice or communication is delivered via facsimile at the facsimile telephone
number specified for notice later than 5:00 p.m., eastern standard time, on any
date and earlier than 11:59 p.m., eastern standard time, on such date, (iii) the
Business Day following the date of mailing, if sent by nationally recognized
overnight courier service or (iv) actual receipt by the party to whom such
notice is required to be given. The addresses for such communications shall be
with respect to the Holder of this Warrant or of Warrant Stock issued pursuant
hereto, addressed to such Holder at its last known address or facsimile number
appearing on the books of the Issuer maintained for such purposes, or with
respect to the Issuer, addressed to: Commonwealth Biotechnologies, Inc., 601
Biotech Drive, Richmond, Virginia 23235 Attention: Robert B. Harris, Ph.D.,
President and Chief Executive Officer or to such other address or addresses or
facsimile number or numbers as any such party may most recently have designated
in writing to the other parties hereto by such notice.

         13. Warrant Agent. The Issuer may, by written notice to each Holder of
this Warrant, appoint an agent for the purpose of issuing shares of Warrant
Stock on the exercise of this Warrant pursuant to subsection (b) of Section 2
hereof, exchanging this Warrant pursuant to subsection (d) of Section 2 hereof
or replacing this Warrant pursuant to subsection (d) of Section 3 hereof, or any
of the foregoing, and thereafter any such issuance, exchange or replacement, as
the case may be, shall be made at such office by such agent.

         14. Remedies. The Issuer stipulates that the remedies at law of the
Holder of this Warrant in the event of any default or threatened default by the
Issuer in the performance of or compliance with any of the terms of this Warrant
are not and will not be adequate and that, to the fullest extent permitted by
law, such terms may be specifically enforced by a decree for the specific
performance of any agreement contained herein or by an injunction against a
violation of any of the terms hereof or otherwise.

         15. Suessors and Assigns. This Warrant and the rights evidenced
hereby shall inure to the benefit of and be binding upon the successors and
assigns of the Issuer, the Holder hereof and shall be enforceable by any such
Holder.

         16. Modification and Severability. If, in any action before any court
or agency legally empowered to enforce any provision contained herein, any
provision hereof is found to be unenforceable, then such provision shall be
deemed modified to the extent necessary to make

                                       9

<PAGE>

it enforceable by such court or agency. If any such provision is not enforceable
as set forth in the preceding sentence, the unenforceability of such provision
shall not affect the other provisions of this Warrant, but this Warrant shall be
construed as if such unenforceable provision had never been contained herein.

         17.  Headings. The headings of the Sections of this Warrant are for
convenience of reference only and shall not, for any purpose, be deemed a part
of this Warrant.

                                       10

<PAGE>

         IN WITNESS WHEREOF, the Issuer has executed this Warrant as of the day
and year first above written.

                                            COMMONWEALTH BIOTECHNOLOGIES, INC.

                                            By:  /s/ Robert B. Harris, Ph.D.
                                                 -----------------------------
                                                 President and Chief Executive
                                                 Officer

                                       11

<PAGE>

                                  EXERCISE FORM

                           , pursuant to the provisions of the within Warrant,
--------------------------
hereby elects to purchase     shares of Common Stock of Commonwealth
                          ---
Biotechnologies, Inc. covered by the within Warrant.

Dated:
       ----------------------------------------------
Signature:
           ------------------------------------------
Address:
          -------------------------------------------

FOR USE BY THE ISSUER ONLY:         This Warrant No. SW-     canceled
                                                         ---
(or transferred or exchanged) this       day of            ,     ,
                                   -----        -----------  ----
shares of Common Stock issued therefor in the name of                         ,
                                                      ------------------------
Warrant No. SW-     issued for         shares of Common Stock in the name
               ----            -------
of                        .
   -----------------------

                                       12

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