Project Update

RNS Number:8166X
Black Rock Oil & Gas PLC
05 June 2007


FOR IMMEDIATE RELEASE                                                5 June 2007


                            Black Rock Oil & Gas PLC

                        ("Black Rock" or the "Company")

              Boqueron Concession Farm-in Option Cancelled by CDS


On 30 April 2007 Black Rock Oil & Gas PLC (stock code: BLR), the UK-based
exploration company, announced that it had executed an agreement with CDS Oil &
Gas Group plc ("CDS"), whereby Black Rock had a 100 day option to farm-in down
to the Carboniferous zone in the Boqueron Concession granted to CDS located in
north-west Paraguay (the "Option"). CDS had the right to terminate the Option in
the event that there was a change in control of CDS. Black Rock was informed on
4 June 2007 by CDS that CDS had elected to cancel the Option following the
announcement made by CDS on 18 May 2007 whereby a group of investors will take
up a 59.9% equity stake in CDS.


Dr. John Cubitt, Managing Director, said:


"We will continue to consider other opportunities in the region as part of our
strategy to increase our presence in selected Latin American countries. In the
meantime, Black Rock continues to focus on developing its current Colombian and
North Sea assets."


For further information, please contact:

Black Rock Oil & Gas plc                                            01189 001350
Dr John Cubitt, Managing Director                           www.blackrockoil.com
                                                            --------------------

Beaumont Cornish                                                   0207 628 3396
Michael Cornish

Bankside Consultants
Sue Scott/Michael Padley                                           020 7367 8888



ENDS



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