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                                               
attached:ii                                        Tullett Prebon PLC                       
                                                                                            
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")                   
                                                                                            
                                            OFI Institutional Asset Management, Inc.        
                                            ("OFII")                                        
3. Full name of person(s) subject to the                                                    
notification obligation:iii                 Baring Asset Management Limited ("BAM")         
                                                                                            
                                            Baring Fund Managers Limited ("BFML")           
                                                                                            
                                                                                            
                                                                                            
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                            April 6, 2011                  
reached: v                                                                                  
                                                                                            
6. Date on which issuer notified:                            April 8, 2011                  
                                                                                            
7. Threshold(s) that is/are crossed or         3% (aggregate position increased to 3.01%)   
reached: vi, vii                                                                            
                                                                                            

8. Notified details:                                                                                         
                                                                                                             
                                                                                                             
Tullet Prebon Plc, Level 3, 155 Bishopsgate, London EC2M 3TQ                                                                                                                                                            
                                                                                                             
Nigel Szembel:  [e-mail]                                                                   
                                                                                                             
                                                                                                             
                                                                                                             
A: Voting rights attached to shares viii, ix                                                                 
                                                                                                             
Class/type of Situation previous              Resulting situation after the triggering transaction           
shares        to the triggering                                                                              
              transaction                                                                                    
                                                                                                             
if possible   Number          Number          Number          Number of voting        % of  voting rights x  
using         of              of              of shares       rights                                         
the ISIN CODE Shares          Voting                                                                         
                              Rights          Direct          Direct   Indirect xii   Direct    Indirect     
                                                              xi                                             
                                                                                                             
                                                                                                             
                                              6,181,398 (OFI)          6,181,398                             
                                                                       (OFI)                    2.87% (OFI)  
                                                                                                             
                                                                                                             
              6,108,987 (OFI) 6,108,987 (OFI) 96,629 (OFII)                                                  
                                                                       96,629 (OFII)            0.04% (OFII) 
                                                                                                             
                                                                                                             
              242,237 (BAM)   242,237 (BAM)   53,364 (BAM)                                                   
GB00B1H0DZ51                                                           53,364 (BAM)             0.02% (BAM)  
                                                                                                             
                                                                                                             
              6,351,224       6,351,224       160,000 (BFML)                                                 
              (Total)         (Total)                                  160,000 (BFML)           0.07% (BFML) 
                                                                                                             
                                                                                                             
                                              6,491,391                
                                              (Total)                  6,491,391                3.01% (Total)
                                                                       (Total)                               
                                                                                                             
                                                                                                            
                                                                                                             
B: Qualifying Financial Instruments                                                                          
                                                                                                             
Resulting situation after the triggering transaction                                                         
                                                                                                             
Type of financial           Expiration   Exercise/                Number of voting          % of voting      
instrument                  date xiii    Conversion Period xiv    rights that may be        rights           
                                                                  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 financial      Exercise     Expiration  Exercise/     Number of voting rights    % of voting rights  
instrument             price        date xvii   Conversion    instrument refers to       xix, xx             
                                                period xviii                                                 
                                                                                                             
                                                                                                             
                                                                                         Nominal      Delta  
                                                                                                             
                                                                                                             
Total (A+B+C)                                                                                                
                                                                                                             
Number of voting rights                                Percentage of voting rights                           
                                                                                                             
                                                                                                             
6,181,398 (OFI)                                        2.87% (OFI)                                           
                                                                                                             
96,629 (OFII)                                          0.04% (OFII)                                          
                                                                                                             
53,364 (BAM)                                           0.02% (BAM)                                           
                                                                                                             
160,000 (BFML)                                         0.07% (BFML)                                          
                                                                                                             
6,491,391 (Total)                                      3.01% (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 ("MassMutual") is the ultimate                                   
parent company of OppenheimerFunds, Inc ("OFI"), OFI Institutional Asset                                     
Management, Inc. ("OFII"), Baring Asset Management Limited ("BAM"), and Baring                               
Fund Managers Limited ("BFML").                                                                              
                                                                                                             
                                                                                                             
OFII is a direct wholly-owned subsidiary of OFI, which is a direct wholly-owned                              
subsidiary of Oppenheimer Acquisition Corp., which is a direct wholly-owned                                  
subsidiary of MassMutual Holding LLC, which is owned by MassMutual.                                          
                                                                                                             
                                                                                                             
BFML is a direct wholly-owned subsidiary of BAM, which is an indirect                                        
wholly-owned subsidiary of MassMutual Baring Holding LLC, which is ultimately                                
owned by MassMutual.                                                                                         
                                                                                                             
                                                                                                             
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:                                                                                  
                                                                                                             
4. Contact name:                                       Susan J. Beaudin, Massachusetts Mutual Life Insurance 
                                                       Company                                               
                                                                                                             
15. Contact telephone number:                          011(413)744-5956