RNS Number:5147P
Marconi Corporation PLC
08 September 2003

                                                                Press enquiries:

                    Joe Kelly tel:+44 207 306 1771; email: joe.kelly@marconi.com
               David Beck, tel: + 44 207 306 1490; email: david.beck@marconi.com

                                                             Investor enquiries:

                                    Heather Green tel: + 44 207 306 1735; email:
                                                       heather.green@marconi.com



                            Marconi Corporation plc

      ALL AGM RESOLUTIONS PASSED; SHAREHOLDERS VOTE TO CONSOLIDATE SHARES



LONDON - September 8, 2003 - Marconi Corporation plc's (London: MONI)
shareholders voted overwhelmingly (99.7 percent) at the Company's Annual General
Meeting today in favour of a share consolidation that will lead to each five
existing shares being consolidated into one new share. The consolidation will
take effect from the start of trading on the London market tomorrow, Tuesday,
September 9th 2003. All other resolutions were passed at the meeting, each
having achieved the requisite majority.

Commenting, John Devaney, Marconi Corporation's Chairman, said: "The
consolidation of the shares is an important further step in normalising
Marconi's share register. The consolidation will help us achieve meaningful
savings against the cost of managing a large number of very small
shareholdings."

As first announced on 19 August 2003, following today's AGM Douglas McWilliams
joined the Board as a non-executive director. The Company can confirm that there
are no details to be disclosed in respect of Mr McWilliams pursuant to paragraph
16.4 of the Listing Rules.

Pursuant to the share consolidation, a total of 200,400,000 ordinary shares of
25p each ("new shares") are to be listed; 200,001,968 of which will be issued on
9 September 2003 and the balance of 398,032 will be block listed for future
issuance in relation to the exercise of warrants.

Application has been made to the UK Listing Authority for the new shares to be
admitted to the Official List and to trading on the London Stock Exchange.
Dealings in the new shares are expected to commence on 9 September 2003.

Copies of this announcement are available from Cazenove & Co. Ltd for two
business days from the date hereof.

The table below sets out the final voting figures.

Resolution              FOR           %    AGAINST        %   ABSTENTION      %

1 Receive            427,432,460   99.51    1,032,507   0.24    1,080,252   0.25
report and accounts

2 Approve            416,417,346   96.94   12,044,290   2.80    1,080,476   0.25
directors'
remuneration

3 Re-appoint         428,419,194   99.74       43,309   0.01    1,081,259   0.25
Mr M K Atkinson

4 Re-appoint         428,421,126   99.74       41,376   0.01    1,081,259   0.25
Mr I M Clubb
 
5 Re-appoint         428,426,233   99.74       36,484   0.01    1,081,044   0.25
Mr J F Devaney

6 Re-appoint         428,428,563   99.74       36,130   0.01    1,081,054   0.25
Ms K R Flaherty

7 Re-appoint         428,426,131   99.74       36,570   0.01    1,081,054   0.25
Mr C C Holden 

8 Re-appoint         428,417,201   99.74       45,300   0.01    1,081,259   0.25
Mr W K Koepf

9 Re-appoint         427,437,460   99.51    1,027,313   0.24    1,080,289   0.25
Deloitte &
Touche as auditors

10 Approve           428,380,399   99.73       84,100   0.02    1,080,252   0.25
consolidation of 
share capital



ENDS/...

Notes to Editors

About Marconi Corporation plc

Marconi Corporation plc is a global telecommunications equipment, services and
solutions company. 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 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 Corporation can be found at
www.marconi.com.

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

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 Corporation 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.




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