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Three tugboats took control of the "stricken vessel" that is "unable to manoeuvre".

Clyde tugboats fired water cannons to send off the submarine and its 110-strong crew on Tuesday, before being welcomed by waving well-wishers as it sailed into Plymouth Sound.

The deaths of two men when a tugboat capsized on the Clyde near Greenock was caused by a "breakdown" in safety procedures, an accident report has found.

Controllers will allow the orbit of the ISS to naturally decay over a period of time, and after removing the last crew will command the tugboat to execute the final de-orbit manoeuvre.

Soon after the spillage occurred, the authorities suggested the tanker had originated in Panama and had been towed by a tugboat.