Holding(s) in Company

London Stock Exchange Group PLC
26 October 2006

                   NOTIFICATION OF MAJOR INTERESTS IN SHARES

1. Name of company

London Stock Exchange Group plc

2. Name of shareholder having a major interest

Barclays PLC through the legal entities below:                                                    Holding

Barclays Private Bank and Trust Ltd                                                                 1,806
Barclays Capital Inc                                                                               44,309
Gerrard Ltd                                                                                           375
Barclays Capital Securities Ltd                                                                 1,833,454
Barclays Global Investors Canada Ltd                                                               11,631
Barclays Global Investors Japan Trust & Banking                                                   188,889
Barclays Bank PLC                                                                               1,669,281
Barclays Global Investors Australia Ltd                                                            13,790
Barclays Global Investors Japan Ltd                                                                15,647
Barclays Global Fund Advisors                                                                     817,450
Barclays Global Investors Ltd                                                                   2,200,676
Barclays Life Assurance Co Ltd                                                                    249,813
Barclays Global Investors, N.A.                                                                 1,114,174

3. Please state whether notification indicates that it is in respect of holding
of the shareholder named in 2 above or in respect of a non-beneficial interest
or in the case of an individual holder if it is a holding of that person's
spouse or children under the age of 18

Not disclosed

4. Name of the registered holder(s) and, if more than one holder, the number of
shares held by each of them

Registered Holder                                                                                 Holding

Bank of New York                                                                                   11,339
Barclays Capital Nominees Limited                                                               1,833,454
Barclays Capital Nominees Limited                                                                  44,309
Barclays Capital Nominees Limited                                                               1,669,281
Boiss Nominees Ltd                                                                                203,631
Barclays Global Investors Canada                                                                   11,631
Chase Nominees Ltd                                                                                109,697
Chase Nominees Ltd                                                                                 73,617
Clydesdale Nominees HGB0225                                                                         1,806
Investors Bank and Trust Co.                                                                      817,450
Investors Bank and Trust Co.                                                                    1,010,959
JP Morgan (BGI Custody)                                                                            57,538
JP Morgan (BGI Custody)                                                                           118,658
JP Morgan (BGI Custody)                                                                         1,687,354
JP Morgan (BGI Custody)                                                                           199,994
JP Morgan Chase Bank                                                                               13,790
JP Morgan Chase Bank                                                                                5,472
JP Morgan Chase Bank                                                                              188,889
JP Morgan Chase Bank                                                                               11,228
Mellon Trust - US Custodian /                                                                       6,386
Mitsui Asset                                                                                        2,861
R C Greig Nominees Limited GP1                                                                        375
State Street Boston                                                                                80,018
Trust & Custody Services Bank                                                                       1,558

5. Number of shares / amount of stock acquired

Not disclosed

6. Percentage of issued class

Not disclosed

7. Number of shares / amount of stock disposed

Not disclosed

8. Percentage of issued class

Not disclosed

9. Class of security

Ordinary Shares

10. Date of transaction

Not disclosed

11. Date company informed

26 October 2006

12. Total holding following this notification

8,161,295

13. Total percentage holding of issued class following this notification

3.82%

14. Any additional information

N/A

15. Name of contact and telephone number for queries

Lisa Condron, 020 7797 3517

16. Name and signature of authorised company official responsible for making
this notification

Lisa Condron

Date of notification

26 October 2006

The FSA does not give any express or implied warranty as to the accuracy of this
document or material and does not accept any liability for error or omission.
The FSA is not liable for any damages (including, without limitation, damages
for loss of business or loss of profits) arising in contract, tort or otherwise
from the use of or inability to use this document, or any material contained in
it, or from any action or decision taken as a result of using this document or
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