Rule 8.1 - London Stock Exchange Plc

ABN AMRO BANK N.V.
                  

FORM 8.1

DEALINGS BY OFFERORS, OFFEREE COMPANIES OR THEIR ASSOCIATES
FOR THEMSELVES OR FOR DISCRETIONARY CLIENTS

(Rules 8.1(a) and (b)(i) of the City Code on Takeovers and Mergers)

1. KEY INFORMATION

Name of person dealing (Note 1)           ABN AMRO BANK NV LONDON BRANCH
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Company dealt in                          London Stock Exchange Plc
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Class of relevant security to which the   Ord GBP 0.058333
 dealings being disclosed relate (Note 2)
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Date of dealing                           16th March 2006
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2. INTERESTS, SHORT POSITIONS AND RIGHTS TO SUBSCRIBE

(a) Interests and short positions (following dealing) in the class of relevant
security dealt in (Note 3)
                                          Long                          Short
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                                          Number                        Number
                                                       (%)                             (%)
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(1) Relevant securities                   601,960 (0.38%)
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(2) Derivatives (other than options)
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(3) Options and agreements to
 purchase/sell
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Total                                     601,960 (0.38%)
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(b) Interests and short positions in relevant securities of the company, other
than the class dealt in (Note 3)
Class of relevant security:               Long                          Short
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                                          Number                        Number
                                                       (%)                             (%)
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(1) Relevant securities
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(2) Derivatives (other than options)
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(3) Options and agreements to
 purchase/sell
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Total
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(c) Rights to subscribe (Note 3)

Class of relevant security:               Details
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3. DEALINGS (Note 4)

(a) Purchases and sales

Purchase/sale                      Number of securities              Price per unit (Note 5)
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Sale                               150,000                           11.7500 GBP
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(b) Derivatives transactions (other than options)

Product name,       Long/short (Note 6)    Number of securities (Note 7)   Price per unit (Note 5)
e.g. CFD
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(c) Options transactions in respect of existing securities

(i) Writing, selling, purchasing or varying

Product name,      Writing,        Number of          Exercise  Type, e.g.   Expiry    Option money
e.g. call option    selling,        securities to     price      American,   date      paid/received
                    purchasing,     which the option             European               per unit (Note
                    varying etc.    relates (Note 7)             etc.                   5)
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(ii) Exercising

Product name, e.g. call option     Number of securities              Exercise price per unit (Note 5)
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(d) Other dealings (including new securities) (Note 4)

Nature of transaction (Note 8)     Details                           Price per unit (if applicable) (Note
                                                                      5)
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4. OTHER INFORMATION

Agreements, arrangements or understandings relating to options or derivatives

Full details of any agreement, arrangement or understanding between the person disclosing and any other
 person relating to the voting rights of any relevant securities under any option referred to on this
 form or relating to the voting rights or future acquisition or disposal of any relevant securities to
 which any derivative referred to on this form is referenced.  If none, this should be stated.
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The disposal of the ordinary shares in London Stock Exchange Plc (a constituent of the FTSE 250 Index)
 referred to above on the 16th March 2006, was undertaken by ABN AMRO Bank N.V. London Branch as part of
 a hedge transaction to reduce the economic exposure of the basket swap.


The Panel Executive has informed ABN AMRO Bank NV on an ex parte basis that such transactions are
 permitted and have no Code consequences.
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Is a Supplemental Form 8 attached? (Note 9) YES/NO

Date of disclosure                                          20th  March 2006
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Contact name                                                Mark Burnham
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Telephone number                                            020 7678 5898
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Name of offeree/offeror with which associated               Euronext NV
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Specify category and nature of associate status (Note 10)   Adviser
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Notes

The Notes on Form 8.1 can be viewed on the Takeover Panel's website at
www.thetakeoverpanel.org.uk