Blocklisting Interim Review

Name of applicant:

Cookson Group plc

Name of scheme:

Cookson Group Executive Share Option Schemes

Period of return:

From:

01/01/2008

To:

30/06/2008

Balance under scheme from previous return:

1,398,226 Ordinary 10p Shares

The amount by which the block scheme has been increased, if the scheme has been increased since the date of the last return:

Number of securities issued/allotted under scheme during period:

4,660 Ordinary 10p Shares

Balance under scheme not yet issued/allotted at end of period

1,393,566 Ordinary 10p Shares

Number and class of securities originally listed and the date of admission

3,500,000 Ordinary 1p Shares (March 1998)

2,500,000 Ordinary 1p Shares (January 2005)

185,778 Ordinary 10p Shares (May 2005)

4,000,000 Ordinary 10p Shares (December 2005)

Total number of securities in issue at the end of the period

212,600,969 Ordinary 10p Shares

Name of contact:

Rachel Fell

Address of contact:

Cookson Group plc

165 Fleet Street

London EC4A 2AE

Telephone number of contact:

020 7822 0000

Name of applicant:

Cookson Group plc

Name of scheme:

Cookson Group Employee Share Savings Scheme

Period of return:

From:

01/01/2008

To:

30/06/2008

Balance under scheme from previous return:

545,004 Ordinary 10p Shares

The amount by which the block scheme has been increased, if the scheme has been increased since the date of the last return:

Number of securities issued/allotted under scheme during period:

 33,460 Ordinary 10p Shares

Balance under scheme not yet issued/allotted at end of period

 511,544 Ordinary 10p Shares

Number and class of securities originally listed and the date of admission

1,500,000 Ordinary 1p Shares (February 1996)

2,500,000 Ordinary 1p Shares (January 2005)

290,612 Ordinary 10p Shares (May 2005)

1,500,000 Ordinary 10p Shares (December 2005)

Total number of securities in issue at the end of the period

212,600,969 Ordinary 10p Shares

Name of contact:

Rachel Fell

Address of contact:

Cookson Group plc

165 Fleet Street

London EC4A 2AE

Telephone number of contact:

020 7822 0000