Plectrum (correction of 2.5)

Cairn Energy PLC
14 September 2007


Not for release, publication or distribution, in whole or in part, in or into or
from the United States, Canada, Australia, Japan or any jurisdiction where to do
   so would constitute a violation of the relevant laws of such jurisdiction


Capricorn Oil & Gas Limited (a subsidiary of Cairn Energy PLC) ('Capricorn')
offer for Plectrum Energy ('Plectrum') correction of 2.5 Announcement

The following news release replaces and corrects the previous Capricorn Oil &
Gas Limited 2.5 news release made on Friday 7 September in relation to the level
of irrevocable undertakings disclosed.

The irrevocable undertaking from Mr M Evans disclosed in the 2.5 announcement
made on Friday 7 September should read 7,451,504 Plectrum shares, equating to
approximately 4.1 per cent. of issued share capital as at 6 September 2007 and
not 7,551,504 as previously disclosed.

The irrevocable undertaking from Mr T Lenehan disclosed in the 2.5 announcement
made on Friday 7 September should read 1,201,371 Plectrum shares, equating to
approximately 0.7 per cent. of issued share capital as at 6 September 2007 and
not 1,701,371 as previously disclosed.

Capricorn has received irrevocable undertakings with respect to 42,073,391
Plectrum shares equating to approximately 23.3 per cent. of Plectrum's existing
issued share capital and has acquired 53,540,000 Plectrum Shares, representing
29.7 per cent. of Plectrum's existing issued share capital.  Accordingly,
Capricorn has acquired or has received irrevocable undertakings in respect of,
in aggregate, 95,613,391 Plectrum shares, representing approximately 53.0 per
cent. of Plectrum's existing issued share capital.



ENQUIRIES



For further information contact:



Cairn/Capricorn
Mike Watts                                                    0131 475 3000
Jann Brown
Simon Thomson


Jefferies International
Richard Kent                                                  020 7618 3713



Jefferies International, which is authorised and regulated in the United Kingdom
by the Financial Services Authority, is acting as financial adviser to Cairn and
Capricorn in connection with the Offer and no-one else and will not be
responsible to anyone other than Cairn and Capricorn for providing the
protections afforded to customers of Jefferies International or for providing
advice in relation to the Offer.




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