TP ICAP Regulatory News (TCAP)

11 May 2010 15:27

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 May 7, 2010 reached: v 6. Date on which issuer notified: May 10, 2010 7. Threshold(s) that is/are crossed or 4% (OFI independently increased above 4%)reached: vi, vii 8. Notified details: Tullett Prebon Plc, Level 3, 155 Bishopsgate, London EC2M 3TQ Nigel Szembel, nszembel@tullettprebon.com A: Voting rights attached to shares viii, ix

Class/type Situation previous Resulting situation after the triggering transaction of

to the triggering shares transaction Number Number Number Number of voting % of voting rights x if possible of of of shares rights using Shares Voting the ISIN Rights Direct Direct Indirect Direct Indirect CODE xi xii 8,623,507 8,623,507 8,407,975 8,407,975 (OFI) (OFI) 4.005% (OFI) (OFI) (OFI) GB00B1H0DZ51 242,237 242,237 0.112% (BAM) 242,237 242,237 (BAM) (BAM) (BAM) (BAM) 8,650,212 8,650,212 4.117% (Total) (Total) (Total) 8,865,744 8,865,744 (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 rights that may be rights instrument xiv 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 % of voting rights financial price date xvii Conversion rights instrument xix, xx instrument period refers to xviii Nominal Delta Total (A+B+C) Number of voting rights Percentage of voting rights 8,623,507 (OFI) 4.005% (OFI) 242,237 (BAM) 0.112% (BAM) 8,865,744 (Total) 4.117% (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 Mututal 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: Susan Beaudin, Massachusetts Mutual Life Insurance Company

15. Contact telephone number: 011(413)744-5956