Holding(s) in Company

TR-1: NOTIFICATION OF MAJOR INTERESTS IN SHARES

 

1. Identity of the issuer or the underlying issuer of existing shares to which
voting rights are attached:

COOKSON GROUP PLC

 

2. Reason for the notification (please state Yes/No):

 

An acquisition or disposal of voting rights: ( Yes)

 

An acquisition or disposal of financial instruments which may result in the
acquisition of shares already issued to which voting rights are attached: (   
)

 

An event changing the breakdown of voting rights: (    )

 

Other (please specify) : (     )

 

3. Full name of person(s) subject to the notification obligation:

LEGAL & GENERAL GROUP PLC (L&G)

 

4. Full name of shareholder(s) (if different from 3.):

LEGAL & GENERAL ASSUSRANCE (PENSIONS MANAGEMENT) LIMITED (PCM)

 

5. Date of the transaction (and date on which the threshold is crossed or
reached if different):

15 MAY 2007

 

6. Date on which issuer notified:

16 MAY 2007

 

7. Threshold(s) that is/are crossed or reached:

FROM 4% - 3% (L&G)

 

8. Notified details:

……………..

 

A: Voting rights attached to shares

 

Class/type of shares if possible         Situation previous to the    
using the ISIN CODE                       Triggering transaction      
                                                                      
                                     Number of     Number of voting   
                                     shares        Rights             
                                                                      
                                                                      
ORD GBP 0.10                         7,888,084     7,888,084          
                                                                      

 

Resulting situation after the triggering transaction

 

Class/type of shares if possible using Number of   Number of voting   % of voting    
the ISIN CODE                          shares      rights             rights         
                                                                                     
                                       Direct      Direct    Indirect Direct Indirect
                                                                                     
                                                                                     
ORD GBP 0.10                           7,677,689   7,677,689          3.96           
                                                                                     

 

B: Financial Instruments

Resulting situation after the triggering transaction

 

Type of      Expiration Exercise/      Number of voting rights that may be   % of    
financial    Date       Conversion     acquired if the instrument is         voting  
instrument              Period/ Date   exercised/ converted.                 rights  
                                                                                     
                                                                                     
                                                                                     
                                                                                     
                                      N/A                                            
                                                                                     

 

Total (A+B)

Number of voting       % of voting      
rights                 rights           
                                        
                                        
7,677,689              3.96             
                                        

 

9. Chain of controlled undertakings through which the voting rights and/or the
financial instruments are effectively held, if applicable:

 

Legal & General Group plc (Direct and Indirect)                                
(Group)                                                                        
                                                                               
                                                                               
                                                                               
Legal & General Investment Management (Holdings)                               
Limited (LGIMH) (Direct and Indirect)                                          
                                                                               
                                                                               
                                                                               
Legal & General Investment Management Limited                                  
(Indirect) (LGIM)                                                              
                                                                               
                                                                               
                                                                               
Legal & General Group plc (Direct) (L&G) (7,677,689 - 3.96% = LGAS, LGPL & PMC)
                                                                               
                                                                               
                                                                               
Legal & General Investment Management (Holdings)  Legal & General Insurance    
Limited (Direct) (LGIMHD) (6,741,603 - 3.48% =    Holdings Limited (Direct)    
PMC)                                              (LGIH)                       
                                                                               
                                                                               
                                                                               
Legal & General Assurance (Pensions Management)   Legal & General Assurance    
Limited (PMC) (6,741,603 - 3.48% = PMC)           Society Limited (LGAS & LGPL)
                                                                               
                                                                               
                                                                               
                                                  Legal & General Pensions     
                                                  Limited (Direct) (LGPL)      
                                                                               

 

Proxy Voting:

 

10. Name of the proxy holder:

       N/A

                       

11. Number of voting rights proxy holder will cease to hold:

      N/A

 

12. Date on which proxy holder will cease to hold voting rights:

 N/A

 

13. Additional information:

Notification using the voting rights figure of 193,496,933

 

14. Contact name:

RACHEL FELL, DEPUTY SECRETARY, COOKSON GROUP PLC

 

15. Contact telephone number:

020 7822 0000