Document:

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                                                                   EXHIBIT 10.19

                             DATED 20th August 1999

                            LSI LOGIC EUROPE LIMITED

                                       to

                               REMEDY UK LIMITED

                                      with

                               REMEDY CORPORATION
                                   as Surety

                          ---------------------------

                                   UNDERLEASE

                                relating to part
                          first floor Greenwood House
                             London Road Bracknell

                          ---------------------------

                   [CANNINGS CONNOLLY SOLICITORS LETTERHEAD]

                  Hillgate House 26 Old Bailey London EC4M 7HQ
                      Tel 0171-329 9000 Fax 0171-329-5000

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THIS UNDERLEASE is made the 20th day of August 1999 BETWEEN LSI LOGIC EUROPE
LIMITED (Company No. 1633351) whose registered office is at Greenwood House
London Road Bracknell Berkshire RG12 2UB ("the Landlord" which expression shall
where the context so admits include the person for the time being entitled to
the reversion immediately expectant on the expiry of the term hereby created) of
the first part REMEDY UK LIMITED (Company No. 3207994) whose registered office
is at 100 New Bridge Street London EC4V 6JA ("the Tenant" which expression shall
where the context so admits include its successors in title and assigns) of the
second part and REMEDY CORPORATION a company incorporated according to the laws
of Delaware whose principal place of business is at 1505 Salado Drive Mountain
View California CA-94043 and whose address for service in England and Wales is
c/o Baker McKenzie (Ref PWS) 100 New Bridge Street London EC4V 6JA ("the
Surety") of the third part

WHEREAS:

(1)  By a Lease ("the Lease") dated 13th January 1997 and made between Scottish
     Amicable Life Assurance Limited ("the Superior Landlord" which expression
     shall where the context so admits include its successors in title and
     assigns)(1) and the Landlord (2) ALL THAT piece or parcel of land together
     with the building thereon known as Greenwood House London Road Bracknell
     Berkshire which is for identification purposes only shown edged red on the
     plan annexed to the Lease ("the Premises") were demised to the Landlord for
     a term of twenty-five years from 25th December 1996

(2)  The Premises remain vested in the Landlord for the unexpired residue of the
     said term created by the Lease subject to the rents and covenants and
     conditions on the part of the tenant reserved by and contained in the Lease

NOW THIS DEED WITNESSETH as follows:-

1    In consideration of the rents covenants and conditions hereinafter
     reserved and contained and on the part of the Tenant to be paid observed
     and performed the Landlord HEREBY DEMISES unto the Tenant ALL THOSE
     premises described in the First Schedule hereto ("the Demised Premises")
     TOGETHER WITH the rights set out in the Second Schedule hereto in common
     with the Superior Landlord, the Landlord and any persons respectively
     authorized thereby

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     and any other person having the like rights EXCEPT AND RESERVED unto the
     Superior Landlord the Landlord and all persons authorised thereby and
     anyone otherwise entitled thereto the rights set out in the Third Schedule
     hereto TO HOLD the same unto the Tenant for a term of three years from and
     including 13th January 2000 (thus expiring on 12th January 2003) SUBJECT
     TO the matters referred to in the Fourth Schedule hereto YIELDING AND
     PAYING therefor during the said term:

1.1  The yearly rent of FOUR HUNDRED AND NINETEEN THOUSAND ONE HUNDRED AND
     THIRTY-TWO POUNDS (L419,132) (subject to review in accordance with Clause
     3 of the Lease as applied herein) by equal quarterly payments in advance
     on the usual quarter days the first of such payments or a proportionate
     part thereof in respect of the period commencing on 13th January 2000 and
     ending on 24th March 2000 to be made on 13th January 2000

1.2  By way of further and additional yearly rent within fourteen days of
     demand an amount equivalent to twenty-two decimal point seven two (22.72%)
     of the yearly rents reserved by Clauses 2.2 and 2.3 of the Lease payable
     at the same time as the said yearly rents reserved by the Lease are
     payable

1.3  By way of further and additional rent the yearly rent of FORTY-SEVEN
     THOUSAND NINE HUNDRED POUNDS (L47,900) by way of service charge by equal
     quarterly payments in advance on the usual quarter days the first of such
     payments or proportionate part thereof in respect of the period commencing
     on the date of this Underlease and ending on the day preceding the quarter
     day next following to made on the date of this Underlease.

1.4  By way of further and additional rent interest at the yearly rate of Four
     pounds per centum per annum above the base rate for the time being of
     Barclays Bank Plc upon all rents hereinbefore reserved and other payments
     due to the Landlord under the provisions of this Underlease not paid
     within seven days from and including the date upon which the same ought to
     have been paid with effect from the date or dates upon which the same
     become payable until the date on which payment thereof is received by the
     Landlord (as well as before any judgment) such interest to be payable on
     demand.

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1.5       Upon the production of a valid value added tax invoice addressed to
          Tenant value added tax on any of the foregoing

2.1       Save as mentioned herein this Underlease shall be subject to the
          covenants on the part of the Tenant exactly similar to those covenants
          on the part of the tenant contained in the Lease (with the exception
          of those relating to payment of rent) it being the intention of the
          parties hereto that this Underlease shall be on the basis that the
          covenants of the tenant within the Lease are deemed to be repeated
          herein in full insofar as they relate to the Demised Premises and are
          consistent with a subletting of part and the Tenant enters into
          exactly similar covenants as those on the part of the tenant contained
          in the Lease BUT so that the following variations to the said
          covenants shall apply to this Underlease:

2.1.1     the covenants on the part of the Tenant contained in this Underlease
          by virtue of the above will be covenants by the Tenant with the
          Landlord and reference within the said covenants to "the Landlord" and
          "the Tenant" shall be to the Landlord herein and the Tenant
          respectively but so that where:

2.1.1.1   the consent of the Landlord is required to the doing of any act or the
          carrying out of any works or for any other reason or

2.1.1.2   works have to be carried out or anything has to be done to the
          satisfaction or to the approval of the Landlord or

2.1.1.3   the Landlord is entitled to enter on to the Demised Premises for any
          reason or reserves to itself the right to enter on to the Demised
          Premises

          then reference to "the Landlord" in all such cases shall mean the
          Landlord and the Superior Landlord and each of them and where any
          consent or approval may not be unreasonably withheld under the Lease
          then the same qualification shall apply to any consent or approval
          required under this Underlease

2.1.2     Clauses 4.1(a) and (b) 4.3(a)(v) and (vi) 5.2 5.3 7.1 7.2(i) and 9 of
          the Lease shall not apply or have effect within this Underlease

2.1.3     the following Clauses of the Lease shall be varied for the purposes of
          this Underlease as follows:-

          Clause 1.1     "Rent" shall mean the sum of the rents reserved by
                         Clauses 1.1.2 and 1.3 of this Underlease

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Clause 3                 "Existing Rent" shall mean the yearly rent of FOUR
                         HUNDRED AND NINETEEN THOUSAND ONE HUNDRED AND
                         THIRTY-TWO POUNDS (L419,132) "Review Date" shall mean
                         25th December 2001 and "Demised Premises" shall mean
                         the Demised Premises as defined in this Underlease

Clause 4.3(a)(iv)        the words "both" and "and the outside" shall be deleted

Clause 4.8(d)(i)&(ii)    the words "without the consent of the Landlord such
                         consent not to be unreasonably withheld or delayed"
                         shall be deleted

Clause 5.4               the words "underleases (however inferior) surrenders"
                         shall be deleted

2.1.4     references in Clause 7.2 and 7.3 to insurances or policies effected by
          the Landlord or risks or perils insured against by the Landlord or
          against which the Landlord shall have maintained insurance shall in
          all cases be references to insurances or policies effected by the
          Superior Landlord or risks or perils insured against by the Superior
          Landlord

2.2       The following covenants shall have effect as covenants on the part of
          the Tenant herein:

2.3.1     to keep perform and observe the covenants terms and conditions on the
          part of the tenant contained in the Lease so far as the same relate to
          the Demised Premises with the exception of the covenants referred to
          in Clause 2.1.2 of this Underlease as varied by Clauses 2.1.3 and
          2.1.4 of this Underlease and to keep the Landlord indemnified against
          all costs liabilities expenses and damages which result to the
          Landlord arising out of or in connection with the Tenant's failure to
          so keep observe and perform the said covenants terms and conditions

2.3.2     to comply with such regulations made in accordance with the principles
          of good estate management as may be made from time to time by the
          Landlord and notified to the Tenant relating to the Premises and/or
          the car parking spaces and access thereto PROVIDED THAT nothing
          hereunder shall entitle the Landlord

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     to do anything which would amount to a derogation of grant or interfere
     with the Tenant's right of quiet enjoyment hereunder

3.   The Tenant HEREBY COVENANTS with the Landlord that it will:

3.1  pay the rents as hereinbefore reserved on the days and in the manner
     aforesaid without any deduction or exercising any rights of set off (except
     as required by law) and if so required by the Landlord pay the rent first
     hereinbefore reserved by bankers' standing order or credit transfer to
     such bank and account in the United Kingdom as the Landlord shall from time
     to time nominate

3.2  not underlet or share possession or occupation of the whole or any part of
     the Demised Premises

4.   The Landlord HEREBY COVENANTS with the Tenant that:

4.1  subject to the payment by the Tenant of the rents hereinbefore reserved and
     provided that the Tenant has complied with all the covenants and conditions
     herein contained and on the part of the Tenant to be observed the Tenant
     shall and may peaceably hold and enjoy the Demised Premises during the term
     hereby created without any interruption by the Landlord or any person
     lawfully claiming through under or in trust for it or by title paramount.

4.2  The Landlord will if so requested by the Tenant use all reasonable
     endeavours to enforce the covenants entered into by the Superior Landlord
     in the Lease

4.3  the Landlord shall observe and perform the covenants in the Lease save in
     so far as they are the responsibility of the Tenant pursuant to this
     Underlease

4.4  Subject to an indemnity for costs from the Tenant at the request and cost
     of the Tenant to use reasonable endeavours to obtain from the Superior
     Landlord all licenses which are necessary to enable the Landlord to grant
     any license to the Tenant under this Underlease for which the Landlord's
     consent under this Underlease is not to be unreasonably withheld or
     delayed.

4.5  throughout the term to provide the services listed in the Fifth Schedule in
     a proper and efficient manner and (where appropriate) using good and
     suitable materials PROVIDED THAT the Landlord shall not be liable to the
     Tenant for any breach of its obligations in this Clause 4.5 where the
     breach was caused by

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          something beyond the Landlord's control (provided the Landlord uses
          reasonable endeavours to remedy the breach as soon as is reasonably
          practicable)

5.        The parties hereto hereby agree and declare that this Underlease is
          made subject to exactly similar provisos agreements and provisions
          (herein between the Landlord and the Tenant) as are contained in
          Clause 7.3 and Clause 8 of the Lease as if the same were herein
          repeated in full.

6.1       The Surety covenants with the Landlord named in this Underlease
          throughout the Term and any extension by statute of the tenancy
          created by this Underlease and (without the need for any express
          assignment) with all of its successors in title:

6.1.1     if the Tenant does not pay the rents reserved by this Underlease or
          any other sum due under this Underlease on the date on which it is due
          to pay to the Landlord on demand the rents or other sum and the
          expression "other sum" includes (without limitation) any sum that the
          Tenant is ordered to pay in any proceedings arising out of this
          Underlease or agreed to pay by way of settlement of those proceedings

6.1.2     if the Tenant is in breach of any provision of this Underlease to
          remedy that breach on demand and to indemnify and keep indemnified the
          Landlord against all losses costs and expenses suffered by the
          Landlord as a result (directly or indirectly) of that breach

6.1.3     in addition to the obligations set out in clauses 6.1.1 and 6.1.2 of
          this Underlease is disclaimed by the Tenant's trustee in bankruptcy or
          liquidator;

6.1.3.1   to pay to the Landlord on demand an amount equal to the rents and
          other sums of a recurring nature that would have been payable under
          this Underlease for the period beginning on the date of disclaimer and
          ending on the earliest of:

6.1.3.1.1 the date upon which the Demised Premises are re-let

6.1.3.1.2 three months from the date of disclaimer

6.1.3.2   if requested by the Landlord within ninety days of disclaimer to take
          from the Landlord an Underlease of the Demised Premises from the date
          of disclaimer for the residue of the Term at the rents payable at the
          time of disclaimer and upon the same terms as those contained in this
          Underlease with all provisions of a

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          periodical nature expressed to apply on the actual dates that would
          have applied if this Underlease had not been disclaimed

6.1.3.3   to pay the reasonable and proper costs of the Landlord incurred in
          relation to the disclaimer and where appropriate the grant of the
          lease to the Surety

6.2       The obligations of the Surety set out in Clause 6.1 will continue to
          apply even if:

6.2.1     the Landlord grants any time or indulgence to the Tenant or fails to
          enforce payment of the rents or other sums or the performance of the
          terms of this Underlease

6.2.2     the Landlord refuses to accept the rents tendered when the Landlord
          was entitled (or would after the service of a notice under the Law
          of Property Act 1925 Section 146 be entitled) to re-enter the Demised
          Premises

6.2.3     the terms of this Underlease are varied

6.2.4     the Tenant surrenders part of the Demised Premises and where this
          happens the liability of the Surety under this Underlease continues
          for the part of the Demised Premises not surrendered after making any
          necessary apportionments under the Law of Property Act 1926 Section
          140

6.2.5     the Surety would have been released by any other event

7.        Having been authorized to do so by an Order of the Mayor's and City of
          London Court Case number MY 971275 made on 20th August 1999 under the
          provisions of Section 38(4) of the Landlord and Tenant Act 1954 (as
          amended by the Law of Property Act 1969) the parties hereto agree that
          the provisions of Sections 24 to 28 (inclusive) of that Act shall be
          excluded in relation to the tenancy hereby created

8.        This Underlease shall be governed by and construed in accordance with
          English law and each party agreed to submit to the exclusive
          jurisdiction of the English courts as regards any claim or matter
          arising under this Underlease

9.        The parties certify that there is no agreement for lease to which
          this Underlease gives effect

IN WITNESS whereof the parties hereto have duly executed this Underlease as a
deed the day and year first before written

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<PAGE>   9

                               THE FIRST SCHEDULE

                           ("the Demised Premises")

ALL THOSE premises comprising part first floor of the Premises and shown for the
purposes of identification only edged red on the plan annexed to this Underlease
and comprising:

1.   the paint paper and other decorative finishes applied to the interior of
     the external walls and columns of the Premises but not any other part of
     the external walls and columns

2.   the floor finishes but nothing below them

3.   the ceiling finishes and any suspended ceilings but nothing above the
     ceiling finishes

4.   any non-load-bearing internal walls wholly within the Demised Premises

5.   the inner half of the internal non-load-bearing walls dividing the Demised
     Premises from other parts of the Premises

6.   the doors and door frames and internal window fittings

7.   all additions and improvements

8.   all fittings installed by the Landlord and/or the Superior Landlord

9.   all fixtures (whether or not fixed to the property at the commencement of
     the term) except any installed by the Tenant that can be removed without
     defacing the Demised Premises

10.  any Conduits (as defined in the Lease) wholly in the Demised Premises that
     exclusively serve the Demised Premises

                              THE SECOND SCHEDULE

                                (Rights Granted)

1.   The rights granted by paragraph 1 of Schedule 1 to the Lease

2.   The right to use the passenger lift and the stairways shown hatched blue
     on the plan annexed to this Underlease between the ground and first floors
     of the

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     premises only for proper purposes in connection with the use of the
     Demised Premises.

3.   The right to use the toilets situated on the first floor of the Premises.

4.   The right to use sixty (60) car parking spaces within the curtilage of the
     Premises for the purposes of parking private motor cars only belonging to
     personnel working at or visiting the Demised Premises such car parking
     spaces to be in the positions designated from time to time in writing by
     the Landlord.

5.   The right to display the Tenant's name and logo on an external sign in the
     landscaped area at the front of the premises in such position and of such
     size and design as the Landlord shall previously approve in writing (such
     approval not to be unreasonably withheld or delayed) and to display its
     name on any directory board maintained by the Landlord in the main
     entrance area in the Premises.

6.   The right of support and shelter from the Premises as enjoyed at the date
     of this Underlease.

7.   For so long as the Tenant is also the tenant of part of the ground floor
     of the Premises demised by an underlease of even date herewith the right
     to install and retain data and voice cabling connecting the Demised
     Premises to such first floor premises within the existing riser ducts in
     the Premises the Tenant making good any damage caused in the exercise of
     this right.

                               THE THIRD SCHEDULE

                         (Rights Excepted and Reserved)

1.   The matters referred to in Schedule 2 to the Lease.

2.   The right to the transmission of utilities from and to the remainder of the
     Premises through the Conduits (as defined aforesaid) that are now or may
     during the term be on the Demised Premises.

3.   The right for Landlord at all reasonable times upon reasonable prior notice
     to enter the Demised Premises with or without workmen plant and materials
     for the purposes of complying with its obligations contained in the Lease
     or for carrying out alterations or to have access for any purpose to the
     switch room

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     risers or other parts of the Demised Premises or for the purposes set out
     in Clause 4.9 of the Lease (as the same has effect in this Underlease)

4.   The right to erect scaffolding for altering refurbishing re-fitting
     repairing or cleaning the Premises provided that such scaffolding shall not
     restrict access to or the use and enjoyment of the Demised Premises by the
     Tenant

5.   The right to alter refurbish re-fit and repair the Premises even if this
     affects the light and air coming to the Demised Premises or temporarily
     causes nuisance damage annoyance or inconvenience to the Tenant by noise
     dust vibration or otherwise provided this does not materially affect the
     Tenant's ability to use the Demised Premises for any purpose permitted by
     this Underlease

6.   The right in an emergency to pass through the Demised Premises in
     accordance with any regulations or requirements of any competent authority

7.   The right of support and protection from time to time enjoyed by other
     parts of the Premises

                              THE FOURTH SCHEDULE

                   (Matters to which the Demised is subject)

The matters referred to in Schedule 3 to the Lease

                               THE FIFTH SCHEDULE

                                   (Services)

1.   Repairing the exterior and structure of the Premises including roofs
     foundations load-bearing walls and columns external walls cladding floors
     ceilings windows (excluding internal window fixings) and all other
     structural parts (but excluding the finishes applied to the internal walls
     ceilings and floors in the Demised Premises)

2.   Repairing the outer half of all non-load-bearing walls that separate the
     Demised Premises from other parts of the Premises

                                       10

<PAGE>   12
3.   Maintaining repairing cleaning decorating and lighting all parts of the
     Premises over which the Tenant is granted rights in this Underlease
     including the car park to a reasonable standard

4.   Maintaining cleaning overhauling and serving all plant and service
     conducting media in the Premises including the lifts

5.   Cleaning the exterior of all windows and window frames of the Demised
     Premises on a monthly basis

6.   Providing air conditioning and heating to the Demised Premises to such
     temperatures between the hours of 9:00 a.m. and 5:30 p.m. on normal working
     days and between such dates as the Landlord may reasonably decide and
     (subject to the Tenant meeting the proper costs of the same) at such other
     times as may be requested by the Tenant

7.   Maintaining repairing cleaning decorating and lighting the toilets on the
     first floor of the Premises to a reasonable standard and to supply hot and
     cold water and washing and toilet needs in the same

8.   Providing and maintaining fire protection and fire fighting equipment in
     the Premises (excluding the Demised Premises)

9.   Keeping all landscaped areas tidy

10.  Providing such security arrangements in the Premises as Landlord considers
     adequate

11.  Providing a reception desk in the entrance hall in the Premises that is
     staffed during normal business hours

SIGNED as a deed by LSI LOGIC  )
EUROPE LIMITED acting by a     )
Director and its Secretary or  )
two Directors                  )

                                Director  Agent of LSI Logic Europe Limited

                                Secretary   A.D. Brown

                                       11<PAGE>   1
                                                                   EXHIBIT 10.20

                             Dated 20th August 1999

                            LSI LOGIC EUROPE LIMITED

                                       to

                               REMEDY UK LIMITED

                                      with

                               REMEDY CORPORATION
                                   as Surety

                       ----------------------------------

                                   UNDERLEASE

                        relating to part ground and part
                          first floors Greenwood House
                             London Road Bracknell

                       ----------------------------------

                     [LOGO OF CANNINGS CONNOLLY SOLICITORS]

                  Hillgate House 26 Old Bailey London EC4M 7HQ
                      Tel 0171-329 9000 Fax 0171-329-5000

<PAGE>   2
THIS UNDERLEASE is made on the 20th day of August, 1999
BETWEEN LSI LOGIC EUROPE LIMITED (Company No. 1633351) whose registered office
is at Greenwood House London Road Bracknell Berkshire RG12 2UB ("the Landlord"
which expression shall where the context so admits include the person for the
time being entitled to the reversion immediately expectant on the expiry of the
term hereby created) of the first part REMEDY UK LIMITED (Company No. 3207994)
whose registered office is at 100 New Bridge Street London EC4V 6JA ("the
Tenant" which expression shall where the context so admits include its
successors in title and assigns) of the second part and REMEDY CORPORATION a
company incorporated according to the laws of Delaware whose principal place of
business is at 1505 Salado Drive, Mountain View, California CA-94043 and whose
address for service in England and Wales is c/o Baker McKenzie (Ref PWS) 100
New Bridge Street London EC4V 6JA ("the Surety") or the third part

WHEREAS:

(1)  By a Lease ("the Lease") dated 13th January 1997 and made between Scottish
     Amicable Life Assurance Limited ("the Superior Landlord" which expression
     shall where the context so admits include its successors in title and
     assigns) (1) and the Landlord (2) ALL THAT piece or parcel of land together
     with the building thereon known as Greenwood House London Road Bracknell
     Berkshire which is for identification purposes only shown edged red on the
     plan annexed to the Lease ("the Premises") were demised to the Landlord for
     a term of twenty-five years from 25th December 1996

(2)  The Premises remain vested in the Landlord for the unexpired residue of
     the said term created by the Lease subject to the rents and covenants and
     conditions on the part of the tenant reserved by and contained in the
     Lease.

NOW THIS DEED WITNESSETH as follows:

1.   In consideration of the rents covenants and conditions hereinafter reserved
     and contained and on the part of the Tenant to be paid observed and
     performed the Landlord HEREBY DEMISES unto the Tenant ALL THOSE premises
     described in the First Schedule hereto ("the Demised Premises") TOGETHER
     WITH the rights set out in the Second Schedule hereto in common with the
     Superior Landlord the Landlord and any persons respectively authorised
     thereby and any

<PAGE>   3
     other person having the like rights EXCEPT AND RESERVED unto the Superior
     Landlord the Landlord and all persons authorised thereby and anyone
     otherwise entitled thereto the rights set out in the Third Schedule hereto
     TO HOLD the same unto the Tenant for a term of years from and including 1st
     August 1999 to and including 12th January 2003

     SUBJECT TO the matters referred to in the Fourth Schedule hereto YIELDING
     AND PAYING therefor during the said term:

1.1  The yearly rent of FOUR HUNDRED AND FOURTEEN THOUSAND FOUR HUNDRED AND
     EIGHTY-FOUR POUNDS (L414,484) (subject to review in accordance with Clause
     3 of the Lease as applied herein) by equal quarterly payments in advance on
     the usual quarter days the first of such payments or a proportionate part
     thereof in respect of the period commencing on 20th November 1999 and
     ending on 24th December 1999 to be made on 20th November 1999

1.2  By way of further and additional yearly rent within fourteen days of demand
     an amount equivalent to twenty-two decimal point four seven (22.47%) of the
     yearly rents reserved by Clauses 2.2 and 2.3 of the Lease payable at the
     same time as the said yearly rents reserved by the Lease are payable

1.3  By way of further and additional rent the yearly rent of FORTY-SEVEN
     THOUSAND THREE HUNDRED AND SEVENTY POUNDS (L47,370) by way of service
     charge by equal quarterly payments in advance on the usual quarter days the
     first of such payments or proportionate part thereof in respect of the
     period commencing on the date of this Underlease and ending on the day
     preceding the quarter day next following to made on the date of this
     Underlease

1.4  By way of further and additional rent interest at the yearly rate of Four
     pounds per centum per annum above the base rate for the time being of
     Barclays Bank Plc upon all rents hereinbefore reserved and other payments
     due to the Landlord under the provisions of this Underlease not paid within
     seven days from and including the date upon which the same ought to have
     been paid with effect from the date or dates upon which the same become
     payable until the date on which payment

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          thereof is received by the Landlord (as well after as before any
          judgment) such interest to be payable on demand

1.5       Upon the production of a valid value added tax invoice addressed to
          Tenant value added tax on any of the foregoing

2.1       Save as mentioned herein this Underlease shall be subject to the
          covenants on the part of the Tenant exactly similar to those covenants
          on the part of the tenant contained in the Lease (with the exception
          of those relating to payment of rent) it being the intention of the
          parties hereto that this Underlease shall be on the basis that the
          covenants of the tenant within the Lease are deemed to be repeated
          herein in full insofar as they related to the Demised Premises and are
          consistent with a subletting of part and the Tenant enters into
          exactly similar covenants as those on the part of the tenant contained
          in the Lease BUT so that the following variations to the said
          covenants shall apply in this Underlease:

2.1.1     the covenants on the part of the Tenant contained in this Underlease
          by virtue of the above will be covenants by the Tenant with the
          Landlord and reference within the said covenants to "the Landlord" and
          "the Tenant" shall be to the Landlord herein and the Tenant
          respectively but so that where:

2.1.1.1   the consent of the Landlord is required to the doing of any act or the
          carrying out of any works or for any other reason or

2.1.1.2   works have to be carried out or anything has to be done to the
          satisfaction or to the approval of the Landlord or

2.1.1.3   the Landlord is entitled to enter on to the Demised Premises for any
          reason or reserves to itself the right to enter on to the Demised
          Premises

          then reference to "the Landlord" in all such cases shall mean the
          Landlord and the Superior Landlord and each of them and where any
          consent or approval may not be unreasonably withheld under the Lease
          then the same qualification shall apply to any consent or approval
          required under this Underlease

2.1.2     Clauses 4.1(a) and (b) 4.3(a)(v) and (vi 5.2 5.3 7.1 7.2(i) and 9 of
          the Lease shall not apply or have effect within this Underlease

2.1.3     the following Clauses of the Lease shall be varied for the purposes of
          this Underlease as follows:-

                                       3
<PAGE>   5
Clause 1.1               "Rent" shall mean the sum of the rents reserved by
                         Clauses 1.1.1.2 and 1.3 of this Underlease

Clause 3                 "Existing Rent" shall mean the yearly rent of FOUR
                         HUNDRED AND FOURTEEN THOUSAND FOUR HUNDRED AND
                         EIGHTY-FOUR POUNDS (L414,484 ). "Review
                         Date" shall mean 25th December 2001 and "Demised
                         Premises" shall mean the Demised Premises as defined in
                         this Underlease.

Clause 4.3(a)(iv)        the words "both" and "and the outside" shall be deleted

Clause 4.3(a)            the following shall be added at the end of Clause
                         4(3)(a): "PROVIDED THAT nothing in the foregoing
                         provisions shall oblige the Tenant to put or keep the
                         Demised Premises into a better state or condition than
                         as at the date hereof as evidenced by the Schedule of
                         Condition dated 16th July 1999 prepared by Vail
                         Williams a copy of which has been initialled on behalf
                         of the parties"

Clause 4.8(d)(i)&(ii)    the words "without the consent of the Landlord such
                         consent not to be unreasonably withheld or delayed"
                         shall be deleted

Clause 5.4               the words "underlease (however inferior) surrenders"
                         shall be deleted

2.1.4     references in Clause 7.2 and 7.3 to insurances or policies effected by
          the Landlord or risks or perils insured against by the Landlord or
          against which the Landlord shall have maintained insurance shall in
          all cases be references to insurances or policies effected by the
          Superior Landlord or risks or perils insured against the by Superior
          Landlord

2.2       The following covenants shall have effect as covenants on the part of
          the Tenant herein:

2.3.1     to keep perform and observe the covenants terms and conditions on the
          part of the tenant contained in the Lease so far as the same relate
          to the Demised Premises

                                       4
<PAGE>   6
      with the exception of the covenants referred to in Clause 2.1.2 of this
      Underlease and as varied by Clauses 2.1.3 and 2.1.4 of this Underlease and
      to keep the Landlord indemnified against all costs liabilities expenses
      and damages which result to the Landlord arising out of or in connection
      with the Tenant's failure to so keep observe and perform the said
      covenants terms and conditions

2.3.2 to comply with such regulations made in accordance with the principles of
      good estate management as may be made from time to time by the Landlord
      and notified to the Tenant relating to the Premises and/or the car parking
      spaces and access thereto PROVIDED THAT nothing hereunder shall entitle
      the Landlord to do anything which would amount to a derogation of grant or
      interfere with the Tenant's right of quiet enjoyment hereunder

3.    The Tenant HEREBY COVENANTS with the Landlord that it will:

3.1   pay the rents as hereinbefore reserved on the days and in the manner
      aforesaid without any deduction or exercising any rights of set off
      (except as required by law) and if so required by the Landlord pay the
      rent first hereinbefore reserved by bankers' standing order or credit
      transfer to such bank and account in the United Kingdom as the Landlord
      shall from time to time nominate

3.2   not to underlet or share possession or occupation of the whole or any
      part of the Demised Premises

4.    The Landlord HEREBY COVENANTS with the Tenant that:

4.1   subject to the payment by the Tenant of the rents hereinbefore reserved
      and provided that the Tenant has complied with all the covenants and
      conditions herein contained and on the part of the Tenant to be observed
      the Tenant shall and may peaceably hold and enjoy the Demised Premises
      during the term hereby created without any interruptions by the Landlord
      or any person lawfully claiming through under or in trust for it or by
      title paramount

4.2   The Landlord will if so requested by the Tenant use all reasonable
      endeavours to enforce the covenants entered into by the Superior Landlord
      in the Lease

4.3   the Landlord shall observe and perform the covenants in the Lease save in
      so far as they are the responsibility of the Tenant pursuant to this
      Underlease

                                       5
<PAGE>   7
4.4       Subject to an indemnity for costs from the Tenant at the request and
          cost of the Tenant to use reasonable endeavours to obtain from the
          Superior Landlord all licences which are necessary to enable the
          Landlord to grant any licence to the Tenant under this Underlease for
          which the Landlord's consent under this Underlease is not to be
          unreasonably withheld or delayed

4.5       throughout the term to provide the services listed in the Fifth
          Schedule in a proper and efficient manner and (where appropriate)
          using good and suitable materials PROVIDED THAT the Landlord shall not
          be liable to the Tenant for any breach of its obligations in this
          Clause 4.5 where the breach was caused by something beyond the
          Landlord's control (provided the Landlord uses reasonable endeavours
          to remedy the breach as soon as is reasonably practicable)

5.        The parties hereto hereby agree and declare that this Underlease is
          made subject to exactly similar provisos agreements and provisions
          (herein between the Landlord and the Tenant) as are contained in
          Clause 7.3 and Clause 8 of the Lease as if the same were herein
          repeated in full

6.1       The Surety covenants with the Landlord named in this Underlease
          throughout the Term and any extension by statute of the tenancy
          created by this Underlease and (without the need for any express
          assignment) with all of its successors in title:

6.1.1     if the Tenant does not pay the rents reserved by this Underlease or
          any other sum due under this Underlease on the date on which it is due
          to pay to the Landlord on demand the rents or other sum and the
          expression "other sum" includes (without limitation) any sum that the
          Tenant is ordered to pay in any proceedings arising out of this
          Underlease or agreed to pay by way of settlement of those proceedings

6.1.2     if the Tenant is in breach of any provision of this Underlease to
          remedy that breach on demand and to indemnify and keep indemnified the
          Landlord against all losses costs and expenses suffered by the
          Landlord as a result (directly or indirectly) of that breach

6.1.3.    in addition to the obligations set out in clauses 6.1.1 and 6.1.2 of
          this Underlease is disclaimed by the Tenant's trustee in bankruptcy or
          liquidator:

                                       6
<PAGE>   8
6.1.3.1        to pay to the Landlord on demand an amount equal to the rents and
               other sums of a recurring nature that would have been payable
               under this Underlease for the period beginning on the date of
               disclaimer and ending on the earliest of:

6.1.3.1.1      the date upon which the Demised Premises are re-let

6.1.3.1.2      three months from the date of disclaimer

6.1.3.2        if requested by the Landlord within ninety days of disclaimer to
               take from the Landlord an Underlease of the Demised Premises from
               the date of disclaimer for the residue of the Term at the rents
               payable at the time if disclaimer and upon the same terms as
               those contained in this Underlease with all provisions of a
               periodical nature expressed to apply on the actual dates that
               would have applied if this Underlease had not been disclaimed

6.1.3.3        to pay the reasonable and proper costs of the Landlord incurred
               in relation to the disclaimer and where appropriate the grant of
               the lease to the Surety

6.2            The obligations of the Surety set out in Clause 6.1 will
               continue to apply even if:

6.2.1          the Landlord grants any time or indulgence to the Tenant or fails
               to enforce payment of the rents or other sum or the performance
               of the terms of this Underlease

6.2.2          the Landlord refuses to accept the rents tendered when the
               Landlord was entitled (or would after the service of a notice
               under the Law of Property Act 1925 Section 146 be entitled) to
               re-enter the Demised Premises

6.2.3          the terms of this Underlease are varied

6.2.4          the Tenant surrenders part of the Demised Premises and where this
               happens the liability of the Surety under this Underlease
               continues for the part of the Demised Premises not surrendered
               after making any necessary apportionments under the Law of
               Property Act 1926 Section 140

6.2.5          the Surety would have been released by any other event

7.             Having been authorised to do so by an Order of the Mayor's and
               City of London Court Case Number M7970560 made on 6th August 1999
               under the provisions of Section 38(4) of the Landlord and Tenant
               Act 1954 (as amended by the Law of Property Act 1969) the parties
               hereto agree that the

                                       7
<PAGE>   9
     provisions of Sections 24 to 28 (inclusive) of that Act shall be excluded
     in relation to the tenancy hereby created

8.   This Underlease shall be governed by and construed in accordance with
     English law and each party agreed to submit to the exclusive jurisdiction
     of the English courts as regards any claim or matter arising under this
     Underlease

9.   The parties certify that there is no agreement for lease to which this
     Underlease gives effect

IN WITNESS whereof the parties hereto have duly executed this Underlease as a
deed of the day and year first before written.

                               THE FIRST SCHEDULE

                           ("the Demised Premises")

ALL THOSE premises comprising part ground and part first floor of the Premises
and shown for the purposes of identification only edged red on the plan annexed
to this Underlease and comprising:-

1.   the paint paper and other decorative finishes applied to the interior of
     the external walls and columns of the Premises but not any other part of
     the external walls and columns

2.   the floor finishes but nothing below them

3.   the ceiling finishes and any suspended ceilings but nothing above the
     ceiling finishes

4.   any non-load-bearing internal walls wholly within the Demised Premises

5.   the inner half of the internal non-load-bearing walls dividing the Demised
     Premises from other parts of the Premises

6.   the doors and door frames and internal window fittings

7.   all additions and improvements

8.   all fittings installed by the Landlord and/or the Superior Landlord

                                       8
<PAGE>   10

9.    all fixtures (whether or not fixed to the property at the commencement of
      the term) except any installed by the Tenant that can be removed without
      defacing the Demised Premises

10.   any Conduits (as defined in the Lease) wholly in the Demised Premises
      that exclusively serve the Demised Premises

                              THE SECOND SCHEDULE
                                (Rights Granted)

1.    The right granted by paragraph 1 of Schedule 1 to the Lease

2.    The right to use the stairway shown hatched blue on the plan annexed to
      this Underlease between the ground and first floors of the premises only
      for proper purposes in connection with the use of the Demised Premises

3.    The right to use the toilets situated on the ground and first floors of
      the Premises

4.    The right to use sixty (60) car parking spaces within the curtilage of
      the Premises for the purposes of parking private motor cars only
      belonging to personnel working at or visiting the Demised Premises such
      car parking spaces to be in the positions designated from time to time in
      writing by the Landlord

5.    The right to display the Tenant's name and logo on an external sign in
      the landscaped area at the front of the premises in such position and of
      such size and design as the Landlord shall previously approve in writing
      (such approval not to be unreasonably withheld or delayed) and to display
      its name on any directory board maintained by the Landlord in the main
      entrance area in the Premises.

6.    The right of support and shelter from the Premises as enjoyed at the date
      of this Underlease

7.    For so long as the Tenant is also the tenant of part of the first floor
      of the Premises demised by an underlease of even date herewith the right
      to instal and retain data and voice cabling connecting the Demised
      Premises to such first floor premises within the existing riser ducts in
      the Premises the Tenant making good any damage caused in the exercise of
      this right

                                       9
<PAGE>   11
                               THE THIRD SCHEDULE

                         (Rights Excepted and Reserved)

1.   The matters referred in Schedule 2 to the Lease

2.   The right to the transmission of utilities from and to the remainder of the
     Premises through the Conduits (as defined aforesaid) that are now or may
     during the term be on the Demised Premises

3.   The right for the Landlord at all reasonable times upon reasonable prior
     notice to enter the Demised Premises with or without workmen plant and
     materials for the purposes of complying with its obligations contained in
     the Lease or for carrying out alterations or to have access for any purpose
     to the switch room risers or other parts of the Demised Premises or for the
     purposes set out in Clause 4.9 of the Lease (as the same has effect in this
     Underlease)

4.   The right to erect scaffolding for altering refurbishing re-fitting
     repairing or cleaning the Premises provided that such scaffolding shall not
     restrict access to or the use and enjoyment of the Demised Premises by the
     Tenant

5.   The right to alter refurbish re-fit and repair the Premises even if this
     affects the light and air coming to the Demised Premises or temporarily
     causes nuisance damage annoyance or inconvenience to the Tenant by noise
     dust vibration or otherwise provided this does not materially affect the
     Tenant's ability to use the Demised Premises for any purpose permitted by
     this Underlease

6.   The right in an emergency to pass through the Demised Premises in
     accordance with any regulations or requirements of any competent authority

7.   The right of support and protection from time to time enjoyed by other
     parts of the Premises

                              THE FOURTH SCHEDULE

                   (Matters to which the Demised is subject)

The matters referred to in Schedule 3 to the Lease

                                       10

<PAGE>   12
                               THE FIFTH SCHEDULE

                                   (SERVICES)

1.   Repairing the exterior and structure of the Premises including roofs
     foundations load-bearing walls and columns external walls cladding floors
     ceilings windows (excluding internal window fixings) and all other
     structural parts (but excluding the finishes applied to the internal walls
     ceiling and floors in the Demised Premises)

2.   Repairing the outer half of all non-load-bearing walls that separate the
     Demised Premises from the other parts of the Premises

3.   Maintaining repairing cleaning decorating and lighting all parts of the
     Premises over which the Tenant is granted rights in this Underlease
     including the car park to a reasonable standard

4.   Maintaining cleaning overhauling and servicing all plant and service
     conducting media in the Premises including the lifts

5.   Cleaning the exterior of all windows and window frames of the Demised
     Premises on a monthly basis

6.   Providing air conditioning and heating to the Demised Premises to such
     temperatures between the hours of 9:00 a.m. and 5:30 p.m. on normal working
     days and between such dates as the Landlord may reasonably decide and
     (subject to the Tenant meeting the proper costs of the same) at such other
     times as may be requested by the Tenant

7.   Maintaining repairing cleaning decorating and lighting the toilets on the
     first floor of the Premises to a reasonable standard and to supply hot and
     cold water and washing and toilet needs in the same

8.   Providing and maintaining fire protection and fire fighting equipment in
     the Premises (excluding the Demised Premises)

9.   Keeping all landscaped areas tidy

10.  Providing such security arrangements in the Premises as Landlord considers
     adequate

                                       11
<PAGE>   13
11.  Providing a reception desk in the entrance hall in the Premises that is
     staffed during normal business hours.

SIGNED as a deed by LSI LOGIC  )
EUROPE LIMITED acting by a     )
Director and its Secretary or  )
two Directors                  )

                                Director /s/ Agent of LSI Logic
                                             Europe Limited
                                        --------------------------

                                Secretary  /s/ A.D. Brown
                                        --------------------------

                                       12

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