A UK accident report has revealed how a tug lost control of the semi-submersible rig Transocean Winner in severe weather off the Scottish coast last year.

The Maritime Accident Investigation Branch (MAIB) said the passage of the ship and the platform close to the shore left little room for error.

Transocean Winner grounded on 8 August on the Isle of Lewis while under tow by the 3,200-dwt tug ALP Forward (built 2008).