The Company’s shares are listed on the Alternative Investment Market (AIM) of the London Stock Exchange. Dealings commenced in May 2005 under the symbol BOR.

Total number of Ordinary Shares in issue: 194,344,170.

As far as the Company is aware, the percentage of AIM securities not in public hands (as defined in the AIM rules) is 56.94% as at July 2007.

As at October 2007 the following had notified the Company of interests in 3% or more of the Company’s securities:

No. of Ordinary Shares

% of share capital

Lansdowne Partners Limited Partnership	27,125,000	13.96
Stephen James Douglas Posford	26,670,000	13.72
Zila Corporation	26,670,000	13.72
Allianz SE	20,890,577	10.75
Petroleum Geo-Services	16,656,670	8.57
Howard Kevin Obee	10,000,000	5.15

Note: the ordinary shares in which Mr D.H.W. Dobson has an interest in are held by Zila Corporation.

The Company’s financial year ends 31 December.

Investor relations contacts:

Clemmie Carr: ccarr@tavistock.co.uk
Simon Hudson: shudson@cityinsights.co.uk

Tavistock Communications Limited
131 Finsbury Pavement
London EC2A 1NT
Tel: 020 7920 3150

Site last update: 13 June 2008