Diploma Regulatory News (DPLM)

DIPLOMA PLC

12 CHARTERHOUSE SQUARE, LONDON EC1M 6AX

TELEPHONE: +44 (0)20 7549 5700

FACSIMILE: +44 (0)20 7549 5715

FOR IMMEDIATE RELEASE

21 January 2013

DIPLOMA PLC

DIRECTORS' INTERESTS IN SHARES

The Company has been notified that on 21 January 2013, Mr BM Thompson, a Director of the Company, sold 105,000 ordinary shares of 5p each in the Company ("Ordinary Shares") held within his Self Invested Pension Plan at 525 pence per share. Mr Thompson also on the same day transferred 25,000 Ordinary Shares for nil consideration to a charitable foundation of which Mr Thompson is a trustee. These shares were subsequently sold at 525 pence per share. Following these transactions, Mr BM Thompson is interested in a total of 1,009,740 Ordinary Shares representing approximately 0.9% of the Company's issued share capital.

The Company has also been notified that on 21 January 2013, Mr NP Lingwood, a Director of the Company, sold 5,400 Ordinary Shares at 525 pence per share. Following this transaction, Mr NP Lingwood is interested in a total of 219,422 Ordinary Shares representing approximately 0.2% of the Company's issued share capital.

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