Holding(s) in Company

Rockhopper Exploration plc
05 September 2007


Rockhopper Exploration PLC ('the Company')
5 September 2007

                              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:

RAB SPECIAL SITUATIONS (MASTER) FUND LTD

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

CREDIT SUISSE CLIENT NOMINEES (UK) LIMITED

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

3 September 2007

6. Date on which issuer notified:

4 September 2007

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

6%

8. Notified details:

A: Voting rights attached to shares

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

ORDINARY
SHARES   5,829,810     7.70%  4,617,310   4,617,310  100,000   6.10%    0.13%


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/       exercised/ converted              rights
                        Date
N/A          N/A        N/A           N/A                               N/A


Total (A+B)
Number of voting rights                      % of voting rights
A ONLY                                       6.23%


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

RAB Capital plc acts as investment manager for RAB SPECIAL SITUATIONS (MASTER)
FUND LTD. RAB Capital plc does not act as custodian for its clients and
therefore the shares are held in the nominee name of the custodian of its
clients, which is CREDIT SUISSE CLIENT NOMINEES (UK) LIMITED.

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                                   020 7202 2601




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            The company news service from the London Stock Exchange