Holding(s) in Company

Oxford Instruments plc has been notified that BT Pension Scheme Trustees
Limited as trustee of the BT Pension Scheme has an interest in 1,715,762
(Indirect) Ordinary Shares of 5p each which, represents 3.474% of the issued
share capital of the Company. The number of Indirect voting rights is also
1,715,762.

Of the above amount The Hermes UK Small Companies Focus Fund has a direct
interest in 1,328,891 Ordinary Shares of 5p each which represents 2.690% of the
issued share capital of Oxford Instruments plc.

BT Pension Scheme Trustees Limited is the parent undertaking of Britel Fund
Trustees Limited, which is the parent undertaking of Hermes Fund Managers
Limited. Hermes Fund Managers Limited is the parent undertaking of:

 1. Hermes Equity Ownership Services Limited (voting rights held in this issuer
    0.279%)
   
 2. Hermes Focus Asset Management Limited (voting rights held in this issuer
    3.195%)
   
Jo Young

Company Secretarial Assistant

Oxford Instruments plc

15 September 2008