The semi-submersible, which was targeted by Greenpeace last month in an effort to halt the drilling campaign, was sighted by activists last night about 320 kilometres off west Greenland after a week-long search to track down the vessel.

Speaking from the Greenpeace vessel Esperanza, oil campaigner Ben Ayliffe told Upstreamonline: “We are unable to reveal our plan of action. At the moment we are bearing witness to what is going on."

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