Launch of ADR Programme

Halma p.l.c.

Launch of ADR Programme

Halma, the leading safety, health and sensor technology group, today announces the launch of a Level 1 Sponsored American Depositary Receipt ('ADR') programme with JPMorgan Chase Bank, N.A. appointed to act as the depositary bank.

Beginning on 1 June 2010, each ADR will represent five Halma ordinary shares and will trade on the OTC market in the USA under Cusip 40637C209. However, on or after 11 June 2010, following an ADR ratio change, each ADR will represent three Halma ordinary shares. Halma's ordinary shares will continue to trade on the London Stock Exchange.

For further information, please contact:

Halma p.l.c.

Andrew Williams, Chief Executive

Kevin Thompson, Finance Director

Tel: +44 (0)1494 721111

Hogarth Partnership Limited

Rachel Hirst/Andrew Jaques

Tel: +44 (0)20 7357 9477

A copy of this announcement, together with other information about Halma, may be viewed on its website: www.halma.com