SAR3 - Bookham Technology plc

Aviva PLC
25 September 2003

                                                                                                              FORM SAR 3
Date of Disclosure:           25 September 2003

Lodge with a RIS or Newstrack if appropriate and the Takeover Panel. A copy must also be sent to the
company the shares of which are acquired.

DISCLOSURE UNDER RULE 3 OF THE RULES GOVERNING SUBSTANTIAL
ACQUISITIONS OF SHARES ('SARs')

Date of acquisition:          24/09/2003

Acquisition in (name of company):                              BOOKHAM TECHNOLOGY PLC

(1)     Class of voting shares (e.g. ordinary shares)          ORD GBP0.00333
        Number of shares/rights over shares acquired                  10,522,644   Shares             0   Rights
        If rights over shares acquired, as opposed to the shares themselves, specify nature of rights

(2)     Resultant total holding of voting shares (and % of
        total voting shares in issue)                                              32,690,417                15.714%

(3)     Party making disclosure:           Aviva plc

(4)     (a)    Name of purchaser acquiring shares or rights over
              Shares                                                       Aviva plc and its Subsidiaries
        (b)    Names of other persons acting by agreement or
              understanding (see SAR 5)

Signed, for and on behalf of the part named in (3) above:
(Also print name of signatory):                                            Neil Whittaker

Telephone and extension number:                                            01603 684420

Note:       Under SAR 5, the holdings of and acquisitions by persons acting by agreement or
            understanding must be aggregated and treated as a holding of or acquisition by one person.
            Note 3 on SAR 5 requires persons who must aggregate holdings to disclose certain disposals.

For full details of SARs disclosure requirements, see Rules 3 and 5 of the SARs. If in doubt, contact the
Panel on Takeovers and Mergers, Monitoring Section, Tel. No: 020 7638 0129. Email:
[e-mail]


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