Diploma Regulatory News (DPLM)

FOR FILING PURPOSES ONLY IN ACCORDANCE WITH REGULATION 22 OF THE TRANSPARENCY (DIRECTIVE 204/109/EC) REGULATIONS

2007

STANDARD FORM TR-1

VOTING RIGHTS ATTACHED TO SHARES - ARTICLE 12(1) OF DIRECTIVE 2004/109/EC

FINANCIAL INSTRUMENTS- ARTICLE 11(3) OF THE COMMISSION DIRECTIVE 2007/14/EC

1. Identity of the issuer or the underlying issuer of existing shares to whichvoting rights are attached:

Diploma PLC "the Company"

2. Reason for the notification (please tick the appropriate box or boxes):

[X] an acquisition or disposal of voting rights

[ ] an acquisition or disposal of financial instruments which may result in the acquisition of shares already issued to which voting rights are attached

[ ] an event changing the breakdown of voting rights

3. Full name of person(s) subject to the notification obligation:

I.G. International Management Limited on behalf of itself and each of the following, each of which has an individual notification obligation;

 -I.G. Investment Management, Ltd.

 -Investors Group Inc.

 -IGM Financial Inc.

4. Full name of shareholder(s) (if different from 3.):Mellon Nominees (UK) Limited

5. Date of the transaction and date on which the threshold is crossed or reached:January 16, 2014

6. Date on which issuer notified:February 05, 2014

7. Threshold(s) that is/are crossed or reached: 3%

Investors Group Inc. is a 100% shareholder in both I.G. Investment Management, Ltd.

and I.G. International Management Limited.

IGM Financial Inc. is a 100% shareholder in Investors Group Inc.

All of the above (except I.G, Investment Management, Ltd. and I.G. International

Management Limited) have an indirect holding of 2.998% as a result of Regulation 15(1)(e)

10. In case of proxy voting: [name of the proxy holder] will cease to hold[number] voting rights as of [date]. Not applicable.

11. Additional information;

Contact name: Jean Carroll, I.G. International Management Limited (investment

advisor to two of the three mutual funds that hold the shares that are the subject of this

notice)

Contact telephone number: +353-1-449 4002

Done at Dublin, Ireland on January 16, 2014.

8. Notified details:

9. Chain of controlled undertakings through which the voting rights and/or the financial instruments are effectively held, if applicable:

The voting rights (2.998%) are held by I.G. Investment Management, Ltd. (2.998%), acting as manager and portfolio advisor, and I.G. International Management Limited (2.998%) acting as portfolio advisor, of various mutual funds, as a result of Regulation 15(l)(h).