Holding(s) in Company

For filings with the FSA include the annex                                              
                                                                                        
For filings with issuer exclude the annex                                               
                                                                                     
                                                                                        
TR-1: NOTIFICATION OF MAJOR INTEREST IN SHARESi                                         
                                                                                        
                                                                                        
                                                                                        
1. Identity of the issuer or the underlying issuer                                      
of existing shares to which voting rights are                   Tullett Prebon PLC      
attached:ii                                                                             
                                                                                        
2 Reason for the notification (please tick the appropriate box or boxes):               
                                                                                        
An acquisition or disposal of voting rights                                            X
                                                                                        
An acquisition or disposal of qualifying financial instruments which may result         
in the acquisition of shares already issued to which voting rights are attached         
                                                                                        
An acquisition or disposal of instruments with similar economic effect to               
qualifying financial instruments                                                        
                                                                                        
An event changing the breakdown of voting rights                                        
                                                                                        
Other (please specify):                                                                 
                                                                                        
                                                  OppenheimerFunds, Inc ("OFI")         
3. Full name of person(s) subject to the                                                
notification obligation:iii                                                             
                                             Baring Asset Management Limited ("BAM")    
                                                                                        
4. Full name of shareholder(s)                                                          
 (if different from 3.):iv                                                              
                                                                                        
5. Date of the transaction and date on                                                  
which the threshold is crossed or                         9, June 2010                  
reached: v                                                                              
                                                                                        
6. Date on which issuer notified:                         10 June, 2010                 
                                                                                        
7. Threshold(s) that is/are crossed or       4% (OFI independently fell below the 4%    
reached: vi, vii                                      threshold to 3.9116%)             
                                                                                        
8. Notified details:                                                                         
                                                                                             
            Tullett Prebon Plc, Level 3, 155 Bishopsgate, London EC2M 3TQ                    
            Nicola Challen, [e-mail]                                       
            Averil Patel, [e-mail]                                           
                                                                                             
A: Voting rights attached to shares viii, ix                                                 
                                                                                             
Class/type   Situation previous       Resulting situation after the triggering               
of           to the triggering        transaction                                            
shares       transaction                                                                     
                                                                                             
             Number     Number        Number      Number of voting    % of  voting           
if possible  of         of            of shares   rights              rights x               
using        Shares     Voting                                                               
the ISIN                Rights        Direct      Direct xi  Indirect Direct    Indirect     
CODE                                                         xii                             
                                                                                             
             8,775,797  8,775,797     8,422,197                                 3.9116%      
             (OFI)      (OFI)         (OFI)                                     (OFI)        
                                                                                             
GB00B1H0DZ51                                                                                 
             242,237    242,237(BAM)  242,237                                   0.1125%      
             (BAM)                    (BAM)                                     (BAM)        
                                                                                             
                        9,018,034                                                            
             9,018,034  (Total)       8,664,434                                 4.0241%      
             (Total)                  (Total)                                   (Total)      
                                                                                             
                                                                                             
B: Qualifying Financial Instruments                                                          
                                                                                             
Resulting situation after the triggering transaction                                         
                                                                                             
Type of        Expiration    Exercise/             Number of voting           % of voting    
financial      date xiii     Conversion Period xiv rights that may be         rights         
instrument                                         acquired if the                           
                                                   instrument is                             
                                                   exercised/ converted.                     
                                                                                             
                                                                                             
C: Financial Instruments with similar economic effect to Qualifying Financial                
Instruments xv, xvi                                                                          
                                                                                             
Resulting situation after the triggering transaction                                         
                                                                                             
Type of       Exercise   Expiration Exercise/    Number of voting rights  % of voting        
financial     price      date xvii  Conversion   instrument refers to     rights xix, xx     
instrument                          period xviii                                             
                                                                                             
                                                                                             
                                                                          Nominal Delta      
                                                                                             
Total (A+B+C)                                                                           
                                                                                        
Number of voting rights                  Percentage of voting rights                    
                                                                                        
8,422,197 (OFI)                          3.9116% (OFI)                                  
                                                                                        
242,237 (BAM)                            0.1125% (BAM)                                  
                                                                                        
8,664,434 (Total)                        4.0241% (Total)                                
                                                                                        

9. Chain of controlled undertakings through which the voting rights and/or the          
financial instruments are effectively held, if applicable: xxi                          
                                                                                        
The percentage of holdings noted above is based on the total outstanding shares         
of 215,313,584                                                                          
                                                                                        
Massachusetts Mutual Life Insurance Company is the parent company of Baring             
Asset Management ("BAM") and OppenheimerFunds, Inc. ("OFI").                            
                                                                                        
Proxy Voting:                                                                           
                                                                                        
10. Name of the proxy holder:                                                           
                                                                                        
11. Number of voting rights proxy holder will cease                                     
to hold:                                                                                
                                                                                        
12. Date on which proxy holder will cease to hold                                       
voting rights:                                                                          
                                                                                        
13. Additional information:                                                             
                                                                                        
14. Contact name:                Rose Baker, Massachusetts Mutual Life Insurance Company
                                                                                        
15. Contact telephone number:    001(413)744-8258