RNS Number:7992T
Aventus Capital Management
06 May 2008



                                                                        FORM 8.3

    DEALINGS BY PERSONS WITH INTERESTS IN SECURITIES REPRESENTING 1% OR MORE

                        (Rule 8.3 of the Takeover Code)





1.         KEY INFORMATION


Name of person dealing  (Note 1)               Aventus Capital Management

Company dealt in                               Black Rock Oil and Gas Plc

Class of relevant security to which the        Ord 1p
dealings being disclosed relate (Note 2)

Date of dealing                                02 May 2008



2.         INTERESTS, SHORT POSITIONS AND RIGHTS TO SUBSCRIBE



(a)        Interests and short positions (following dealing) in the class of
relevant security dealt in (Note 3)
                                                             Long                              Short

                                               Number                     (%)       Number                    (%) 

(1) Relevant securities                        1,553,754                  4.83%

(2) Derivatives (other than options)

(3) Options and agreements to purchase/sell

Total                                          1,553,754                  4.83%




(b)       Interests and short positions in relevant securities of the company,
other than the class dealt in (Note 3)


Class of relevant security:                                  Long                              Short

                                               Number                     (%)       Number                    (%) 

(1) Relevant securities

(2) Derivatives (other than options)

(3) Options and agreements to purchase/sell

Total





(c)        Rights to subscribe (Note 3)


Class of relevant security:                    Details





3.         DEALINGS (Note 4)



(a)        Purchases and sales


Purchase/sale                          Number of securities                  Price per unit (Note 5)

Sale                                   150,000                               4.5p
Sale                                   225,000                               5.0p



(b)       Derivatives transactions (other than options)


Product name,         Long/short (Note 6)       Number of securities (Note 7)        Price per unit (Note 5)
e.g. CFD





(c)        Options transactions in respect of existing securities

(i)         Writing, selling, purchasing or varying


Product name,         Writing, selling,  Number of securities  Exercise   Type, e.g.      Expiry    Option money
e.g. call option      purchasing,        to which the option   price      American,       date      paid/received per
                      varying etc.       relates (Note 7)                 European etc.             unit (Note 5)


(ii)        Exercising


Product name, e.g. call option         Number of securities                  Exercise price per unit (Note 5)








(d)       Other dealings (including new securities) (Note 4)


Nature of transaction (Note 8)         Details                               Price per unit (if applicable) (Note 5)



4.         OTHER INFORMATION



Agreements, arrangements or understandings relating to options or derivatives



Full details of any agreement, arrangement or understanding between the person disclosing and any other person relating
to the voting rights of any relevant securities under any option referred to on this form or relating to the voting
rights or future acquisition or disposal of any relevant securities to which any derivative referred to on this form is
referenced.  If none, this should be stated.





Is a Supplemental Form 8 attached? (Note 9)                       NO




Date of disclosure                                                06 May 2008

Contact name                                                      Simon Ray

Telephone number                                                  01242 248581

If a connected EFM, name of offeree/offeror with which connected

If a connected EFM, state nature of connection (Note 10)




Notes



The Notes on Form 8.3 can be viewed on the Takeover Panel's website at
www.thetakeoverpanel.org.uk



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