SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549


                                    FORM 6-K


                            Report of Foreign Issuer

                      Pursuant to Rule 13a-16 or 15d-16 of
                       the Securities Exchange Act of 1934


                         For the Month of March 10, 2003

                         Commission file number: 0-30924


                                   MARCONI PLC

             (Exact name of Registrant as specified in its Charter)


                                    4th Floor
                                  Regents Place
                                 338 Euston Road
                                     London
                                     NW1 3BT
                    (Address of principal executive offices)


(Indicate by check mark whether the registrant files or will file annual
reports under cover Form 20-F or Form 40-F.)


                             Form 20-F X   Form 40-F


(Indicate by check mark whether the registrant by furnishing the information
contained in this Form is also thereby furnishing the information to the
Commission pursuant to Rule 12g3-2(b) under the Securities Exchange
Act of 1934.)


                                   Yes   No X


              CAUTIONARY NOTE REGARDING FORWARD-LOOKING STATEMENTS

In order to utilize the "Safe Harbor"  provisions  of the United States  Private
Securities  Litigation Reform Act of 1995 (the "Reform Act"),  Marconi plc ( the
"Company")  is  providing  the  following  cautionary   statement.   Except  for
historical information contained herein,  statements contained in this Report on
Form 6-K may constitute  "forward-looking  statements" within the meaning of the
Reform Act. The words "believe",  "anticipate",  "expect", "intend", "estimate",
"plan",  "assume",  "positioned",   "will",  "may",  "risk"  and  other  similar
expressions which are predictions of or indicate future events and future trends
which do not relate to historical matters identify  forward-looking  statements.
Reliance should not be placed on such statements  because they involve known and
unknown  risks,  uncertainties  and other factors which are in some cases beyond
the control of the Company,  together with its subsidiaries  (the "Group"),  and
may cause the actual results, performance or achievements of the Group to differ
materially  from  anticipated   future  results,   performance  or  achievements
expressed or implied by such forward-looking  statements (and from past results,
performance or  achievement).  Certain  factors that may cause such  differences
include  but are not  limited  to the  following:  (1) any major  disruption  in
production  at our key  facilities;  (2) changes in the  environmental,  tax and
other laws and regulations,  which, among other things,  could cause us to incur
substantial additional capital expenditures and operation and maintenance costs;
and (3) adverse  changes in the markets for our products,  including as a result
of increased  competition in the highly  competitive  international  markets for
such products. These and other risks, uncertainties and factors are discussed in
the  Company's  Registration  Statement  on Form F-1 and other  filings with the
Securities and Exchange  Commission,  including this Form 6-K.  Shareholders and
prospective  investors  are  cautioned  not to  place  undue  reliance  on these
forward-looking  statements which speak only as to the Company's  judgment as of
the date hereof.  Any such  forward-looking  statements are not intended to give
any  assurance as to future  results.  The Company  undertakes  no obligation to
publicly update or revise any of these  forward-looking  statements,  whether to
reflect new information or future events or circumstances or otherwise.





                    MARCONI WINS GBP20 MILLION COMMUNICATIONS
                        SERVICES CONTRACT FOR TUBE LINES

     Five-year agreement with Tube Lines covers maintenance of Jubilee Line
                            communications equipment

London - 10 March 2003 - Marconi (MONI) today announces that has won a GBP19.2
million services contract from Tube Lines - the company selected by the
Government to maintain and upgrade the infrastructure on the Jubilee, Northern
and Piccadilly Lines (JNP). The five year contract is for the maintenance of
existing communications equipment on the Jubilee Line.

The communications system is vital for the effective operation of the Jubilee
Line. The contract between Marconi's Services division and Tube Lines is
designed to ensure that any faults with the communication systems on the Jubilee
line are responded to and rectified quickly. Tube Lines is committed to reducing
the number of faults that affect the service year on year.

Marconi will continuously assess communications system performance using its
Maintenance Management System (TRAMMS) to ensure optimum performance and reduce
the number of faults. Marconi will also provide all corrective and preventative
maintenance in supporting over 34 different communications systems on the
Jubilee Line and provide remote monitoring of system elements that will improve
system performance, as well as reduce the equipment downtime, thereby reducing
service disruption.


ENDS/...



Notes to editors

 1. Tube Lines is responsible for the maintenance and upgrade of the
    infrastructure on the Jubilee, Northern and Piccadilly lines. London
    Underground is responsible for operating the Underground, for employing
    drivers and station staff, for ticketing and fares, and for the Tube's
    safety regime.

 2. The Tube Lines consortium consists of Amey, Bechtel and Jarvis, and brings
    together some of the most experienced providers of business services with
    specialist skills in the rail industry, including track and signal renewals,
    plus project and operational management. They are providing some of the best
    project and operational managers from around the world to work on the
    modernisation of the tube system.



About Marconi plc

Marconi plc is a global telecommunications equipment and solutions company
headquartered in London. The company's core business is the provision of
innovative and reliable optical networks, broadband routing and switching and
broadband access technologies and services. The company's aim is to help fixed
and mobile telecommunications operators worldwide reduce costs and increase
revenues.

The company's customer base includes many of the world's largest
telecommunications operators. The company is listed on the London Stock Exchange
under the symbol MONI. Additional information about Marconi can be found at
www.marconi.com.

This press release contains forward-looking statements with respect to products,
partners, customers, future growth and other matters. Please refer to the Form
20-F report and Form 6-K reports filed by Marconi plc with the United States
Securities and Exchange Commission for a discussion of risks that could cause
actual results to differ materially from such statements.

Copyright (c) 2003 Marconi plc. All rights reserved. All brands or product names
are trademarks of their respective holders.



Marconi contacts

Name:  Joe Kelly                                     Heather Green
Title: Public Relations                              Investor Relations
Phone: +44 (0) 207 306 1771                          +44 (0) 207 306 1735
+44 (0) 207 603 1490
joe.kelly@marconi.com                                heather.green@marconi.com






                                   SIGNATURES

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.


                                       MARCONI PLC

                                       By:     ____M Skelly____

                                       Name:   M Skelly
                                       Title:  Secretary


Date: March 10, 2003