Part I DESIGNATED OWNERS

BP Petroleum Development Ltd., whose registered office is at Britannic House, Moor Lane, London EC2Y 9BU.

Britoil p.l.c., whose registered office is at 301 St. Vincent Street, Glasgow G2 5DD.

Chevron UK Ltd., whose registered office is at 2 Portman Street, London W1H OAN.

Det Norske Oljeselskap a/s, whose registered office is at Stranden 3, – Aker Brygge 0250, Oslo 2 Norway.

Elf UK p.l.c., whose registered office is at Knightsbridge House, 197 Knightsbridge, London SW7 1RZ.

Enterprise Petroleum Ltd., whose registered office is at 5 Strand, London WC2N 5HU.

LASMO North Sea p.l.c., whose registered office is at Bastion House, 140 London Wall, London EC2Y 5DN.

Murphy Petroleum Ltd., whose registered office is at Winston House, Dollis Park, Finchley Church End, London N3 1HZ.

Ocean Exploration Company Ltd., whose registered office is at Winston House, Dollis Park, Finchley Church End, London N3 1HZ.

Ranger Oil (UK) Ltd., whose registered office is at Ranger House, 69/71 Great Peter Street, London SW1P 2BN.

Tenneco United Kingdom Inc., whose principal place of business in the United Kingdom is at Castle Yard House, 1 Castle Yard, Richmond Surrey TW10 6TF.

Texaco Britain Ltd., whose registered office is at 1 Knightsbridge Green, London SW1X 7QJ.

Total Oil Marine p.l.c., whose registered office is at Berkeley Square House, Berkeley Square, London W1X 6LT.

Unocal UK Ltd., whose registered office is at 32 Cadbury Road, Sunbury-on-Thames, Middlesex TW16 7LU.