Blocklisting Interim Review

HALMA p.l.c.

BLOCKLISTING SIX MONTHLY RETURN

Date: 11 August 2010

Name of applicant:

Halma p.l.c.

Name of scheme:

1990 Share Option Scheme 1996 Unapproved Share Option Scheme 1999 Company Share Option Plan

Period of return:

From:

1 January 2010

To:

30 June 2010

Balance of unallotted securities under scheme(s) from previous return:

1990 Share Option Scheme 1996 Unapproved Share Option Scheme 1999 Company Share Option Plan Unallocated

40,500 0 0 406,872

Plus: The amount by which the block scheme(s) has been increased since the date of the last return (if any increase has been applied for):

750,000

Less: Number of securities issued/

allotted under scheme(s) during period (see LR3.5.7G):

1990 Share Option Scheme 1996 Unapproved Share Option Scheme 1999 Company Share Option Plan

Nil 0 193,177

Equals: Balance under scheme(s) not yet issued/allotted at end of period:

1990 Share Option Scheme 1996 Unapproved Share Option Scheme 1999 Company Share Option Plan Unallocated

40,500 0 0 963,695

Name of contact

Carol Chesney

Telephone number of contact

01494 721111

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