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

7 April 2020

DIPLOMA PLC

DIRECTOR DECLARATION

Diploma PLC announces that Nigel Lingwood, the Group Finance Director, has been appointed as an Independent non-Executive Director and Chairman of the Audit Committee of Volution Group plc, a company listed on the London Stock Exchange. The appointment is effective from 30 April 2020.