Holding(s) in Company

Diploma PLC
17 January 2007

Letter to: Diploma PLC
Dated: 17 January, 2007

Disclosure of Interest in shares Under Section 198

Please find below the details of the notifiable interest of Legal & General 
Group plc and/or its subsidiaries held in nominee accounts in the relevant share
capital of your company:

Material Interest

HSBC BANK PLC A/c 914945                1,646
HSBC BANK PLC A/c 636544               18,044
HSBC BANK PLC A/c 775245               60,889
HSBC BANK PLC A/c 357206              613,862
HSBC BANK PLC A/c 747381               47,800
HSBC BANK PLC A/c 866203               39,020
HSBC BANK PLC A/c 969995               62,826
HSBC BANK PLC A/c 999392                4,383
HSBC BANK PLC A/c 360509               51,250

                                      _______     _____
                                      899,720     3.97%
                                      =======     =====

We currently have a notifiable interest in 899,720 Ordinary 5p shares which we 
understand represents 3.97% of that class of your share capital calculated on an
issued share capital of 22,647,911 Ordinary 5p shares.

From: Legal & General Investment Management Limited



                      This information is provided by RNS
            The company news service from the London Stock Exchange