Risk of collision

A nuclear submarine and a ferry were at “serious risk of collision” after decisions on the vessel were based on inaccurate data, a probe has found.

The vessels came within 100m of each other in the 2018 incident, a Marine Accident Investigation Branch report found.

Crew on the Stena Superfast VII ferry, travelling from Belfast to Cairnryan, “took immediate action to avoid collision” after seeing the sub’s periscope.