Diploma Regulatory News (DPLM)

DIPLOMA PLC

10-11 CHARTERHOUSE SQUARE, LONDON EC1M 6EE

TELEPHONE: +44 (0)20 7549 5700

FACSIMILE: +44 (0)20 7549 5715

10 January 2022

Annual General Meeting arrangements in light of COVID-19

On 7 December 2021 Diploma plc ("Diploma" or "the Company") issued a notice convening an Annual General Meeting of the Company ("AGM") to be held at 14:00 (UK time) on 19 January 2022 (the "Notice of AGM").

Since the Company issued the Notice of AGM, the UK Government has announced additional measures in response to the risks of the Omicron variant of COVID-19 (the "Plan B Announcement"). In the light of the Plan B Announcement, the Company has reviewed AGM arrangements with a view to protecting the health and safety of shareholders, employees and other potential attendees.

The AGM will still be held as advertised in the Notice of AGM and shareholders have the right to attend, speak and vote at the meeting if they so wish. However, in view of the Plan B Announcement, in the interests of shareholders' own safety and the safety of others, Diploma strongly encourages shareholders to consider appointing the Chair as their proxy instead of attending the AGM in person. Instructions for submitting proxy votes are contained in the Notice of AGM.

Shareholders who wish to ask questions at the AGM are invited to do so via email to Investors@diplomaplc.com by 12:00 on 18 January 2022. The Board will endeavour to provide written answers directly as soon as practicable after the AGM.

In the light of the Plan B Announcement, the AGM will focus solely on the formal business set out in the Notice of AGM and only the minimum number of Directors necessary to constitute a quorum will attend. Regrettably, we will not make any presentations or provide refreshments.

Should circumstances or Government guidance change, including the introduction of regulations to prohibit or further restrict public gatherings, Diploma reserves the right to take further steps in respect of AGM attendance. To the extent this is necessary, we will provide an update via a Regulatory Information Service announcement and our website as soon as practicable.

If shareholders nonetheless wish to attend the AGM in person, they are strongly advised to wear a face covering (unless exempt) and to take other appropriate precautions to protect themselves and other attendees, including taking full account of the new rules outlined in the Plan B Announcement.

For further information, please contact:

LEI:2138008OGI7VYG8FGR19