Service Ann. - Bookham Tech

London Stock Exchange
9 June 2000


                           Service Announcement

            Trading and London Market Information Link (LMIL)

This is to inform you that as part of the FTSE quarterly review announced
earlier this week, Bookham Technology ('Bookham') is being added to SETS,
as it will form part of the FTSE100 index with effect from 19 June 2000.
Ahead of Bookham's entry into the FTSE100 index, a decision has been
taken to add Bookham to SETS from 15 June 2000.

The segment and sector details for Bookham are as follows.

Issuer Name           Mnemonic     ISIN             NMS      Tick Size

Bookham Technology    BHM          GB0002243052     2000         W

The security will be added to SETS as follows:

 DATE                              Segment          Sector

 15/6/00 - 16/6/00                 SET3             STOS
 19/6/00                           SET1             FT10

Customers are advised to take either the Reference Data Changes service
on Thursday 15 June and Friday 16 June 2000. If taking the Full Reference
Data Download, this should be taken on Thursday 15 June and Monday 19
June 2000.

If you have any queries please contact your account manager or the
Technical Information Desk on 020 7797 3939 (STX 33939).

An archive of previously issued service announcements is available in the
technical library section of the Exchange's Internet site
(http://www.londonstockexchange.com/techlib).