Vesuvius Regulatory News (VSVS)

(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.

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 managerial responsibilities/director

4.

State whether notification relates to a person connected with a person discharging managerial responsibilities/director named in 3 and identify the connected person

Jeffrey Lindsay Hewitt

In respect of Director named in 3, Jeffrey Lindsay Hewitt

5.

Indicate whether the notification is in respect of a holding of the person referred to in 3 or 4 above or in respect of a non-beneficial interest

6.

Description of shares (including class), debentures or derivatives or financial instruments relating to shares

In respect of Directors named in 3, Jeffrey Lindsay Hewitt

Ordinary £1 Shares

7.

Name of registered shareholders(s) and, if more than one, the number of shares held by each of them

8

State the nature of the transaction

Jeffrey Lindsay Hewitt

Participation in Dividend Reinvestment Plan

9.

Number of shares, debentures or financial instruments relating to shares acquired

10.

Percentage of issued class acquired (treasury shares of that class should not be taken into account when calculating percentage)

337 Ordinary £1 Shares

Less than 0.0001%

11.

Number of shares, debentures or financial instruments relating to shares disposed

12.

Percentage of issued class disposed (treasury shares of that class should not be taken into account when calculating percentage)

N/A

N/A

13.

Price per share or value of transaction

14.

Date and place of transaction

626.8917%

12 June 2012, London

15.

Total holding following notification and total percentage holding following notification (any treasury shares should not be taken into account when calculating percentage)

16.

Date issuer informed of transaction

15,074 Ordinary £1 Shares, 0.005%

18 June 2012

17

Date of grant

18.

Period during which or date on which it can be exercised

19.

Total amount paid (if any) for grant of the option

20.

Description of shares or debentures involved (class and number)

21.

Exercise price (if fixed at time of grant) or indication that price is to be fixed at the time of exercise

22.

Total number of shares or debentures over which options held following notification

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

Richard Malthouse, Group Secretary, Cookson Group plc

__________________________________________________________

Date of notification 18 June 2012