UNITED STATES
                      SECURITIES AND EXCHANGE COMMISSION
                            WASHINGTON, D.C. 20549

                                     ----

                                   FORM 10-K

                       FOR ANNUAL AND TRANSITION REPORTS
                    PURSUANT TO SECTIONS 13 OR 15(d) OF THE
                        SECURITIES EXCHANGE ACT OF 1934




         (Mark One)

          /X/ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES
          EXCHANGE ACT OF 1934

          For the fiscal year ended December 31, 2004

                                      or

          / / TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURI-
          TIES EXCHANGE ACT OF 1934

              For the transition period from ________ to ________

                       Commission File Number: 001-31835


                            Lehman ABS Corporation,
                            -----------------------
                                 on behalf of:
          Corporate Backed Trust Certificates, Royal & Sun Alliance
                       Bond-Backed Series 2002-11 Trust
          ----------------------------------------------------------
            (Exact name of registrant as specified in its charter)

          Delaware                                  13-3447441
--------------------------------       ----------------------------------------
(State or other jurisdiction of          (I.R.S. Employer Identification No.)
incorporation or organization)

  745 Seventh Avenue, New York, New York                      10019
------------------------------------------        ----------------------------
 (Address of principal executive offices)                   (Zip Code)

        Registrant's telephone number, including area code:  (212) 526-7000

Securities registered pursuant to Section 12(b) of the Act:

Title of Class                                Name of Registered Exchange
--------------                                ---------------------------
Corporate Backed Trust Certificates,        New York Stock Exchange ("NYSE")
Royal & Sun Alliance Bond-Backed
         Series 2002-11

Securities registered pursuant to Section 12(g) of the Act:   None


<PAGE>


Indicate by check mark whether the registrant: (1) Has filed all reports
required to be filed by section 13 or 15(d) of the Securities Exchange Act of
1934 during the preceding 12 months (or for such shorter period that the
registrant was required to file such reports), and (2) has been subject to
file requirements for the past 90 days
Yes /X/         No / /

Indicate by check mark if disclosure of delinquent filers pursuant to Item 405
of Regulation S-K is not contained herein, and will not be contained, to the
best of registrant's knowledge, in definitive proxy or information statements
incorporated by reference in Part III of this Form 10-K or any amendment to
this Form 10-K.  /X/

Indicate by check mark whether the registrant is an accelerated filer (as
defined in Rule 12b-2 of the Act).
Yes / /    No /X/

State the aggregate market value of the voting and non-voting common equity
held by non-affiliates computed by reference to the price at which the common
equity was last sold, or the average bid and asked price of such common
equity, as of the last business day of the registrant's most recently
completed second fiscal quarter:

     The registrant has no voting stock or class of common stock that is held
by non-affiliates.


                      DOCUMENTS INCORPORATED BY REFERENCE

The distribution reports to security holders filed on Form 8-K during the
fiscal year in lieu of reports on Form 10-Q which includes the reports filed
on Form 8-K listed in Item 15(a) hereto.

                               Introductory Note

Lehman ABS Corporation (the "Depositor") is the Depositor in respect of the
Corporate Backed Trust Certificates, Royal & Sun Alliance Bond-Backed Series
2002-11 Trust (the "Trust"), a common law trust formed pursuant to the
Standard Terms for Trust Agreements, dated as of January 16, 2001, between the
Depositor and U.S. Bank Trust National Association, as trustee (the
"Trustee"), as supplemented by a Series Supplement (the "Series Supplement")
dated as of June 7, 2002 in respect of the Trust. The Trust's assets consist
solely of subordinated guaranteed bonds issued by Royal & Sun Alliance
Insurance Group plc. The Certificates do not represent obligations of or
interests in the Depositor or the Trustee.

Royal & Sun Alliance Insurance Group plc, the underlying securities issuer, is
subject to the information reporting requirements of the Securities Exchange
Act of 1934, as amended (the "Exchange Act"). For information on the
underlying securities issuer, please see its periodic and current reports
filed with the Securities and Exchange Commission (the "Commission") under
Royal & Sun Alliance Insurance Group plc's Exchange Act file number,
001-15146. The Commission maintains a site on the World Wide Web at
"http://www.sec.gov" at which users can view and download copies of reports,
proxy and information statements and other information filed electronically
through the Electronic Data Gathering, Analysis and Retrieval system, or
"EDGAR." Periodic and current reports and other information required to be
filed pursuant to the Exchange Act by the underlying securities issuer may be
accessed on this site. Neither the Depositor nor the Trustee has participated
in the preparation of such reporting documents, or made any due diligence
investigation with respect to the information provided therein. Neither the
Depositor nor the Trustee has verified the accuracy or completeness of such
documents or reports. There can be no assurance that events affecting the
underlying securities issuer, the underlying securities guarantor or the
underlying securities have not occurred or have not yet been publicly
disclosed which would affect the accuracy or completeness of the publicly
available documents described above.


                                      2
<PAGE>


                                    PART I

Item 1. Business.
         Not Applicable

Item 2.  Properties.
         Not Applicable

Item 3.  Legal Proceedings.
         None

Item 4.  Submission of Matters to a Vote of Security Holders.
         None

                                    PART II

Item 5. Market for Registrant's Common Equity, Related Stockholder Matters and
Issuer Purchases of Equity Securities.

     The publicly offered Certificates representing investors' interest in the
Trust are represented by one or more physical Certificates registered in the
name of "Cede & Co.", the nominee of The Depository Trust Company. Those
publicly offered Certificates are listed on the NYSE.

Item 6.  Selected Financial Data.
         Not Applicable

Item 7. Management's Discussion and Analysis of Financial Condition and
Results of Operation.
         Not Applicable

Item 7A. Quantitative and Qualitative Disclosures About Market Risk.
         Not Applicable

Item 8. Financial Statements and Supplementary Data.
         Not Applicable

Item 9. Changes in and Disagreements With Accountants on Accounting and
Financial Disclosure.
         None

Item 9A. Controls and Procedures.
         Not Applicable

Item 9B.  Other Information.
         None

                                   PART III

Item 10.  Directors and Executive Officers of the Registrant.
         Not Applicable

Item 11.   Executive Compensation.
         Not Applicable

Item 12.  Security Ownership of Certain Beneficial Owners and Management.
         Not Applicable

Item 13.  Certain Relationships and Related Transactions.
         None


                                      3
<PAGE>


Item 14.  Principal Accounting Fees and Services.
         Not Applicable

                                    PART IV

Item 15.  Exhibits, Financial Statement Schedules.

     (a) The following documents have been filed as part of this report.

          1.   Trustee's Distribution Statements documented on Form 8-K
               regarding the distributions from the Trust to the
               certificateholders for the period from January 1, 2004 through
               and including December 31, 2004 have been filed with the
               Securities and Exchange Commission and are hereby incorporated
               by reference. Filing dates are listed below:

<TABLE>
<CAPTION>
----------------------------------------------------------------------------- ---------------------- ---------------
                             Trust Description                                  Distribution Date       Filed on
----------------------------------------------------------------------------- ---------------------- ---------------
<S>                                                                                <C>                  <C>
Corporate Backed Trust Certificates, Royal & Sun Alliance Bond-Backed              04/15/2004          04/27/2004
Series 2002-11 Trust                                                               10/15/2004          10/28/2004
----------------------------------------------------------------------------- ---------------------- ---------------

</TABLE>

          2.   None.

          3.   Exhibits:

               99.1 - Certification by Vice President of the Registrant
               pursuant to 15 U.S.C. Section 7241, as adopted pursuant to
               Section 302 of the Sarbanes-Oxley Act of 2002.

               99.2 - Annual Compliance Report by Trustee pursuant to 15
               U.S.C. Section 7241, as adopted pursuant to Section 302 of the
               Sarbanes-Oxley Act of 2002.

     (b)  See Item 15(a) above.

     (c)  Not Applicable.


                                      4
<PAGE>


                                   SIGNATURE

     Pursuant to the requirements of the Securities Exchange Act of 1934, the
registrant has duly caused this report to be signed on its behalf by the
undersigned thereunto duly authorized.

                                 Lehman ABS Corporation, as Depositor for the
                                 Trust (the "Registrant")



Dated:  March 28, 2005           By:      /s/ CHARLES M. WEAVER
                                    ---------------------------
                                 Name:    Charles M. Weaver
                                 Title:   Vice President


                                      5
<PAGE>


                                            EXHIBIT INDEX

<TABLE>
<CAPTION>
-------------------------------------------------------------------------------------------------------

  Reference                                                                       Exhibit Number
  Number per                    Description of Exhibits                         in this Form 10-K
 Item 601 of
 Regulation SK
-------------------------------------------------------------------------------------------------------
<S>                     <C>                                                           <C>
   (99.1)               Certification by Vice President of the Registrant             99.1
                        pursuant to 15 U.S.C. Section 7241, as adopted
                        pursuant to Section 302 of the Sarbanes-Oxley Act of
                        2002.
-------------------------------------------------------------------------------------------------------
   (99.2)               Annual Compliance Report by Trustee pursuant to 15            99.2
                        U.S.C. Section 7241, as adopted pursuant to Section
                        302 of the Sarbanes-Oxley Act of 2002.
-------------------------------------------------------------------------------------------------------
</TABLE>

                                       6