GARTMORE INVESTMENT MANAGEMENT LTD - Rule 8.3 - Tullett Prebon

                              FORM 8.3 AMENDMENT                               

   DEALINGS BY PERSONS WITH INTERESTS IN SECURITIES REPRESENTING 1% OR MORE    

                        (Rule 8.3 of the Takeover Code)                        

1. KEY INFORMATION

Name of person dealing (Note 1) Gartmore Investment Management Ltd             
                                                                               
Company dealt in                Tullett Prebon                                 
                                                                               
Class of relevant security to   Ordinary 0.25p                                 

which the dealings being                                                       
disclosed relate (Note 2)                                                      
                                                                               
Date of dealing                 15/03/10                                       

2. INTERESTS, SHORT POSITIONS AND RIGHTS TO SUBSCRIBE

(a) Interests and short positions (following dealing) in the class of relevant
security dealt in (Note 3)

                                         Long                   Short          
                                                                               
                                Number (%)             Number (%)              
                                                                               
(1) Relevant securities         872,479 (0.41)                                 
                                                                               
(2) Derivatives (other than     4,243,571 (1.97)                               
options)                                                                       
                                                                               
(3) Options and agreements to                                                  
purchase/sell                                                                  
                                                                               
Total                           5,116,050 (2.38)                               

(b) Interests and short positions in relevant securities of the company, other than the class dealt in (Note 3)

Class of relevant security:              Long                   Short          
                                                                               
                                Number (%)             Number (%)              
                                                                               
(1) Relevant securities                                                        
                                                                               
(2) Derivatives (other than                                                    
options)                                                                       
                                                                               

(3) Options and agreements to                                                  
purchase/sell                                                                  
                                                                               
Total                                                                          

(c) Rights to subscribe (Note 3)

Class of relevant security:     Details                                        
                                                                               
Ordinary shares                                                                

3. DEALINGS (Note 4)

(a) Purchases and sales

Purchase/sale              Number of securities      Price per unit (Note 5)   
                                                                               
Sale                       74,000                    3.668 GBP                 
                                                                               

(b) Derivatives transactions (other than options)

Product name,  Long/short (Note  Number of securities     Price per unit (Note 
               6)                (Note 7)                 5)                   
e.g. CFD                                                                       
                                                                               

(c) Options transactions in respect of existing securities

(i) Writing, selling, purchasing or varying

Product name, Writing, Number of Exercise Type, e.g. Expiry Option

              selling,    securities to          American,          money      
e.g. call     purchasing, which the     price    European   date               
option        varying     option                 etc.               paid/      
              etc.        relates (Note                             received   
                          7)                                        per unit   
                                                                    (Note 5)   
                                                                               

(ii) Exercising

Product name, e.g. call    Number of securities      Exercise price per unit   
option                                               (Note 5)                  
                                                                               

(d) Other dealings (including new securities) (Note 4)

Nature of transaction      Detailsp                  Price per unit (if        
(Note 8)                                             applicable) (Note 5)      
                                                                               

4. OTHER INFORMATION

Agreements, arrangements or understandings relating to options or derivatives

Full details of any agreement, arrangement or understanding between the person disclosing and any other person relating to the voting rights of any relevant securities under any option referred to on this form or relating to the voting rights or future acquisition or disposal of any relevant securities to which any derivative referred to on this form is referenced. If none, this should be stated.

Is a Supplemental Form 8 attached? (Note 9) YES/NO

Date of disclosure                           16th March 2010                   
                                                                               
Contact name                                 Alison Averono                    
                                                                               
Telephone number                             020 7782 2324                     
                                                                               

If a connected EFM, name of offeree/offeror  N/A                               
with which connected                                                           
                                                                               
If a connected EFM, state nature of          N/A                               
connection (Note 10)                                                           

Notes

The Notes on Form 8.3 can be viewed on the Takeover Panel's website at www.thetakeoverpanel.org.uk

Copyright h 16 PR Newswire