Holding(s) in Company

Rockhopper Exploration plc
27 February 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:

RAB CAPITAL PLC

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):

25/02/2008

6. Date on which issuer notified:

26/02/2008

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

5%

8. Notified details:

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

ORDINARY      5,707,080    7.54%   3,257,080    3,257,080    350,000    4.30     0.46
SHARES
GB00B0FVQX23

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
3,607,080 (1,264,770 + 1,992,310 + 350,000)                  4.76

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

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 contact:

Rockhopper Exploration plc    
Sam Moody                       01722 414419

Aquila Financial Limited
Peter Reilly                    0118 979 4100


                      This information is provided by RNS
            The company news service from the London Stock Exchange