Board Committee Changes

DIPLOMA PLC

12 CHARTERHOUSE SQUARE, LONDON EC1M 6AX

TELEPHONE: +44 (0)20 7549 5700

FACSIMILE: +44 (0)20 7549 5715

FOR IMMEDIATE RELEASE

29 July 2013

BOARD COMMITTEE CHANGES

The following changes to membership of the Board sub-Committees were approved today in connection with the development of the Board.

John Nicholas was appointed as Chairman of the Remuneration Committee, in place of Ian Grice who retired as Chairman of the Committee. Marie-Louise Clayton and Charles Packshaw were appointed as members of the Remuneration Committee.

Marie-Louise Clayton, John Nicholas and Charles Packshaw were all appointed as Members of the Nomination Committee. John Nicholas and Charles Packshaw were appointed as Members of the Audit Committee.