The hull to be acquired will be the bare-deck Mitsui F-601 and the topsides contractor will be Swan Hunter. Brown & Root is to carry out detailed engineering. The US company's board approved the $600 million to $700 million development plan, which as well as Leadon will incorporate two fresh oil discoveries in the area, Birse and Glassel. All that the 100% stakeholder in blocks 9/41a and 9/14b now needs is project sanction from the UK authorities.