Director Declaration

DIPLOMA PLC

12 CHARTERHOUSE SQUARE, LONDON EC1M 6AX

TELEPHONE: +44 (0)20 7549 5700

FACSIMILE: +44 (0)20 7549 5715

FOR IMMEDIATE RELEASE

5 June 2015

DIPLOMA PLC

DIRECTOR DECLARATION

Diploma PLC announces that Nigel Lingwood, the Group Finance Director, has been appointed as a Non-Executive Director of Creston plc, a company listed on the London Stock Exchange. The appointment is effective from 1 July 2015.