Holding(s) in Company

Rockhopper Exploration plc
19 March 2008


                                                                               


19 March 2008


Rockhopper Exploration PLC ('the Company')


                              Notifiable Interest


A form TR-1 containing the following information has been received by the
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:

Rockhopper Exploration PLC

2. Reason for the notification

An acquisition or disposal of voting rights

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

MF Global UK Limited

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

N/A

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

17 March 2008

6. Date on which issuer notified:

18 March 2008

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

Below 3%

8. Notified details:

A: Voting rights attached to shares

Class/type of Situation previous to     Resulting situation after the triggering
shares        Triggering transaction    transaction
if possible                             Notification required under DTR
using ISIN                              transitional provision 7
CODE          Number of    Number of    Number   Number of       % of voting
              Shares       Voting       of       voting rights   rights
                           Rights       shares
                                        Direct   Direct Indirect Direct Indirect
GB00B0FVQX23   3,803,317    3,803,317   Below 3% Below  N/A      Below  N/A
                                                 3%              3%

B: Financial Instruments
Resulting situation after the triggering transaction
Type of     Expiration Exercise/     Number of voting rights that may   % of
financial   date       Conversion    be acquired if the instrument is   voting
instrument             Period/ Date  exercised/ converted               rights
N/A         N/A        N/A           N/A                                N/A

Total (A+B)
Number of voting rights                      % of voting rights
                                 1,274,102   Below 3%

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

N/A

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:

N/A

14. Contact name:

N/A

15. Contact telephone number:

N/A

For further information, please contact:


Rockhopper Exploration plc                www.rockhopperexploration.co.uk
Sam Moody - Managing Director             01722 414 419

Aquila Financial Ltd                      www.aquila-financial.com
Peter Reilly                              0118 979 4100

Landsbanki Securities (UK) Limited
Tom Hulme                                 020 7426 9000




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