Holding(s) in Company

Rockhopper Exploration plc
08 April 2008


                                                                             

8 April 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:

AXA SA, 25 Avenue Matignon, 75008 Paris and its group of companies

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):

02/04/08

6. Date on which issuer notified:

03/04/08

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

5%

8. Notified details:

A: Voting rights attached to shares
Class/type  Situation previous to     Resulting situation after the triggering
of shares   Triggering transaction    transaction
if possible                           Notification required under DTR transitional
using ISIN                            provision 7
CODE        Number of    Number of    Number   Number of voting      % of voting
            Shares       Voting       of       rights                rights
                         Rights       shares
                                      Direct   Direct   Indirect     Direct  Indirect
GB00B0FVQX2  3,901,830    3,901,830    1,830    1,830    3,750,000    0.00     4.94%

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
                                 3,751,830                                4.94%

9. Chain of controlled undertakings through which the voting rights and/or the
financial instruments are effectively held, if applicable:
Company / Fund                              Holding                         %
Sun Life Pensions Management ltd                      1,830           0.00241
AXA Framlington                                   3,750,000           4.94017
Monthly Income
                                                  -----------       -----------
                                    Total         3,751,830           4.94258%

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:


For further information please contact:

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

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




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