# FORM 6-K

SECURITIES AND
  EXCHANGE COMMISSION

Washington,
  D.C. 20549

# Report of Foreign
  Issuer

# Pursuant to
  Rule 13a-16 or 15d-16 of

# Securities
  Exchange Act of 1934

For the month
  of March 2004

ABBEY NATIONAL
  PLC(Translation
  of registrants name into English)

Abbey House,
  2 Triton Square, Regents PlaceLondon NW1 3AN,
  England(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. . . .

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# 

# SCHEDULE 10

# NOTIFICATION
  OF MAJOR INTERESTS IN SHARES

1.
  Name of company

Abbey National plc

2. Name of shareholder having
  a major interest   Lehman Brothers International (Europe)

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

As 2 above

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

As 2 above

5. Number of shares / amount
  of stock acquired

73,119,184

6. Percentage of issued class

5.00%

7.
  Number of shares / amount of stock disposed



8. Percentage of issued class



9. Class of security  
  Ordinary shares of 10 p each

10. Date of transaction

18 March 2004

11. Date company informed

23 March
  2004

12. Total holding following
  this notification

73,119,184

13. Total percentage holding
  of issued class following this notification

5.00%

14. Any additional information

15. Name of contact and telephone
  number for queries

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

Shaun Coles

Date of notification

24 March
  2004

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 any such material.

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# 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.



|                          | ABBEY
      NATIONAL PLC                                     
|------------------------- | -------------------------------------------------------------
|Date: 24 March
      2004 |                                                              
|                          | By:  /s/ Shaun
      Coles
      Shaun ColesAbbey Secretariat