Vesuvius Regulatory News (VSVS)

7 May 2010 16:43

NOTIFICATION OF TRANSACTIONS OF DIRECTORS, PERSONS DISCHARGING MANAGERIAL RESPONSIBILITY OR CONNECTED PERSONS

This form is intended for use by an issuer to make a RIS notification required by DR 3.3

(1) An issuer making a notification in respect of a transaction relating to the shares or debentures of the issuer should complete boxes 1 to 16, 23 and 24.

(2) An issuer making a notification in respect of a derivative relating the shares of the issuer should complete boxes 1 to 4, 6, 8, 13, 14, 16, 23 and 24.

(3) An issuer making a notification in respect of options granted to a director /person discharging managerial responsibilities should complete boxes 1 to 3 and 17 to 24.

(4) An issuer making a notification in respect of a financial instrument relating to the shares of the issuer (other than a debenture) should complete boxes 1 to 4, 6, 8, 9, 11, 13, 14, 16, 23 and 24.

Please complete all relevant boxes should in block capital letters.

1. Name of the issuer 2. State whether the notification relates to (i) a transaction notified in accordance with DTR 3.1.2 R; (ii) a disclosure made in accordance with LR 9.8.6 R(1), or; (iii) a disclosure made in accordance with section 793 of the Companies act (2006) Cookson Group plc (i) and (ii)

3. Name of person discharging 4. State whether notification relates

managerial responsibilities/ to a person connected with a person director discharging managerial responsibilities/director named in 3 and identify the connected person Jeffery Francis Harris In respect of Director named in 3, Jeffery Francis Harris

5. Indicate whether the notification 6. Description of shares (including

is in respect of a holding of the class), debentures or derivatives person referred to in 3 or 4 or financial instruments relating above or in respect of a to shares non-beneficial interest In respect of Director named in Ordinary £1 Shares 3, Jeffery Francis Harris

7. Name of registered shareholders 8 State the nature of the transaction

(s) and, if more than one, the number of shares held by each of them Jeffery Francis Harris Purchase of Shares

9. Number of shares, debentures or 10. Percentage of issued class acquired

financial instruments relating to (treasury shares of that class shares acquired should not be taken into account when calculating percentage) 10,000 Ordinary £1 Shares Less than 0.004%

11. Number of shares, debentures or 12. Percentage of issued class disposed

financial instruments relating to (treasury shares of that class shares disposed should not be taken into account when calculating percentage) N/A N/A

13. Price per share or value of 14. Date and place of transaction transaction 501p 7 May 2010, London 15. Total holding following 16. Date issuer informed of transaction

notification and total percentage holding following notification (any treasury shares should not be taken into account when calculating percentage) 10,000 Ordinary £1 Shares, less 7 May 2010 than 0.004%

If a person discharging managerial responsibilities has been granted options by the issuer complete the following boxes

17 Date of grant 18. Period during which or date on which it can be exercised

19. Total amount paid (if any) for 20. Description of shares or

grant of the option debentures involved (class and number)

21. Exercise price (if fixed at time 22. Total number of shares or

of grant) or indication that debentures over which options held price is to be fixed at the time following notification of exercise

23. Any additional information 24. Name of contact and telephone

number for queries Rachel Fell, Deputy Secretary, Cookson Group plc, 020 7822 0000

Name and signature of duly authorised officer of issuer responsible for making notification

Rachel Fell, Deputy Secretary, Cookson Group plc __________________________________________________________

Date of notification 7 May 2010