One of BP plc's deep water fields west of Shetland has been shut down following the discovery of a 'small' oil leak. The oil and water mix had escaped through a hairline crack in a subsea flowline at the Foinaven field. The pipeline affected is on the seabed about two miles from the field production vessel, the Petrojarl Foinaven. The leak was discovered by a remotely-operated vehicle carrying out routine inspection work in the field. The field was immediately shut and oil stopped leaking.