Total Voting Rights

Oxford Instruments plc - Voting Rights and Capital Update

In conformity with the Transparency Directive's transitional provision 6 we
would like to notify the market of the following:

Oxford Instruments plc advises that since 2 April 2007 its capital has
increased by 318 ordinary shares with voting rights.

Therefore, the total number of voting rights in Oxford Instruments plc is
49,198,214.

The above figure (49,198,214) may be used by shareholders as the denominator
for the calculations by which they will determine if they are required to
notify their interest in, or a change to their interest in, Oxford Instruments
plc under the FSA's Disclosure and Transparency Rules.

Jo Young

Company Secretarial Assistant

Oxford Instruments plc

TEL: [phone]

3 May 2007