Holding(s) in Company

Slough Estates PLC
27 August 2003



The Company Secretary
Slough Estates plc
234 Bath Road           Direct Line: 01603 843362
SLOUGH                  Fax: [phone]
SL1 4EE                 Our Ref:    GRU/AC

26 August 2003


Dear Sir

SLOUGH ESTATES PLC (THE 'COMPANY') - SEDOL 0814104

This notification supersedes our previous notification to you dated 13 August
2001 and is prompted by purchases totalling 50,000 on 22 August 2003.

This notification relates to issued ordinary shares of GBP0.25 each in the
capital of the Company (the 'shares') and is given in fulfilment of the
obligations imposed by sections 198 to 202 of the Companies Act 1985 (the
'Act').


1.  Notification on behalf of Morley Fund Management Limited (a subsidiary of
Aviva plc). (formerly CGNU plc)).


1.1            We hereby notify you on behalf of Morley Fund Management Limited
that immediately after the time when the obligation to make this notification
arose Morley Fund Management Limited were interested in 12,510,709 shares.

1.2            The identity of the registered holders of the shares to which
this notification relates and the number of shares held by each of them are set
out in the attached Appendix: Morley Fund Management Limited.

2.            Notification on behalf of Aviva plc.

2.1            We hereby notify you on behalf of Aviva plc that immediately
after the time when the obligation to make this notification arose Aviva plc
were interested in 12,510,709 shares giving the Aviva group a total percentage
interest in the shares of 3.00%.

2.2            The identity of the registered holders of the shares to which
this notification relates and the number of shares held by each of them are set
out in the attached Appendix: Aviva plc.

If you require further information as to which companies in the Aviva group hold
interests in the shares (by virtue of s.203 of the Act) please submit a written
request and we will be happy to supply this information.


We are only required to notify interests which are defined as material interests
when the holding is equal to 3% or more of the Company's relevant share capital.
The term material interests exclude certain categories where we do not hold a
beneficial interest, for example where the shares are held in an Authorised Unit
Trust Scheme or Open Ended Investment Company. Holdings in those categories are
therefore not included in the holding notified under this letter. If you wish us
to confirm the level of holdings in these categories, please let us know.


Yours faithfully



Abby Condick
for and on behalf of
Aviva plc



The Company Secretary                            26 August 2003
Slough Estates plc



APPENDIX: MORLEY FUND MANAGEMENT LIMITED

REGISTERED HOLDERS                            NUMBER OF SHARES HELD

BNY Norwich Union Nominees Ltd            5,303,930          (Material)

Chase GA Group Nominees Ltd               2,888,222          (Material)

Chase Nominees Ltd                          677,500          (Material)

CUIM Nominee Ltd                          3,244,357          (Material)

RBSTB Nominees Ltd                          385,000          (Material)

BT Globenet Nominees Ltd                     11,700          (Material)



TOTAL PERCENTAGE INTEREST OF MORLEY FUND MANAGEMENT LIMITED: 3.00%

ISSUED SHARE CAPITAL ON WHICH THIS NOTIFICATION IS BASED: 416,738,241




The Company Secretary                                       26 August 2003
Slough Estates plc

APPENDIX: Aviva plc

REGISTERED HOLDERS                        NUMBER OF SHARES HELD     

BNY Norwich Union Nominees Ltd          5,303,930          (Material)

Chase GA Group Nominees Ltd             2,888,222          (Material)

Chase Nominees Ltd                        677,500          (Material)

CUIM Nominee Ltd                        3,244,357          (Material)

RBSTB Nominees Ltd                        385,000          (Material)

BT Globenet Nominees Ltd                   11,700          (Material)



TOTAL PERCENTAGE INTEREST OF AVIVA PLC: 3.00%

ISSUED SHARE CAPITAL ON WHICH THIS NOTIFICATION IS BASED: 416,738,241






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