Tullow Oil has completed a further stage of the purchase of the Thames Hewett package, the second of two packages of southern North Sea gas assets and related infrastructure which Tullow purchased from BP for £200.6 million sterling (€328 million), following BP's takeover of ARCO in April 2000.

The gas from the Gawain field is sold under a long-term contract to Powergen. Tullow will have a 50 per cent interest in Gawain, while interests in the exploration licences range from 15 per cent to 80 per cent.