Total Voting Rights

Cookson Group plc - Voting Rights and Capital                                                                          
In conformity with the FSA's Disclosure and Transparency Rule5.6.1, Cookson                                            
Group plc confirms that, at the date of this announcement, it has an issued                                            
share capital of 212,573,620 Ordinary Shares of 10 pence each.  None of these                                          
Ordinary Shares is held in Treasury.                                                                                   
Therefore, the total number of Cookson Group plc shares with voting rights is                                          
212,573,620.                                                                                                           
The above figure of 212,573,620 shares may be used by shareholders as the                                              
denominator for the calculations by which they will determine if they are                                              
required to notify their interest in, or a change to their interest in, Cookson                                        
Group plc under the FSA's Disclosure and Transparency Rules.                                                           
R Fell                                                                                                                 
Deputy Secretary                                                                                                       
31-Jan-08