Disclosure of Short Position

TR-3:

Disclosure of Disclosable Short Position relating to Securities which are the subject of a rights issue

1. Full name of person(s) holding the disclosable short position:

Citigroup Global Markets UK Equity Limited

2: Name of the issuer of the relevant securities

Cookson Group Plc

3: Disclosable short position

(0.47)%

4. Date that disclosable short position was reached or exceeded

30 January 2009