An 82-year-old sailor is heading back to land after a prolonged rescue operation involving the UK and Norwegian coastguard.

Weather conditions had been hampering the rescue of solo yachtsman Julian Mustoe, whose stricken vessel started drifting towards a gas platform in the North Sea on Tuesday evening.

Earlier today he refused to be airlifted by a helicopter because he did not want to abandon his yacht, Harrier of Down.

He has now boarded a Norwegian Coastguard cutter and is being taken to Bergen with his yacht in tow.

Mr Mustoe raised the alarm at about 8.50pm on Tuesday when his vessel suffered a mechanical failure in extreme weather conditions, with 23ft (7m) waves and gale-force winds, around 95 nautical miles from Lerwick in Shetland and 86 nautical miles from Norway.

The mechanical failure left him unable to steer and his 25ft (7.6m) yacht began drifting towards Total's gas platform Alwyn North with 162 people on board. They also put out a distress call but the yacht did not collide with the platform.

A Total spokesman said: "Last night a small yacht was reported to be drifting within a half mile of Total's Alwyn North platform.

"The Coastguard and Alwyn North's emergency response vessel (ERV) offered support to the yacht. At all times the situation was closely monitored and under control by both the coastguard and the ERV."

The stand-by vessel Vos Prospector, from the Dunbar gas field, had contacted Shetland Coastguard after picking up Mr Mustoe's call for help and a rescue operation was launched.

Vos Prospector tried to attach a tow line to the Harrier of Down but could not because of the weather.

Mr Mustoe is thought to have been travelling from Shetland to Bergen when he got into difficulty. The Englishman has written a book titled Voyage Of The Harrier, about his circumnavigation of the world between 2001 and 2012, retracing Charles Darwin's journey in HMS Beagle.

According to Mr Mustoe's website, he planned to set off for the Baltic Sea in the summer, to conduct another historically-informed cruise based on the territory and activities of the medieval Hanseatic League.

A UK Coastguard spokeswoman said: "The man who was left drifting in the North Sea after his yacht lost its steering is now on board a Norwegian Coastguard cutter.

"The UK Coastguard has been working with its counterparts in Norway to help the man who was stuck in challenging weather conditions.

"It's now planned to take him and his yacht - under tow - back to Bergen which is expected to take some hours as it is a prolonged process."