The environmental group’s protest vessel Esperanza sailed this week into the fjord of the Westcon yard at Olen near Haugesund on the west coast where upgrade work is being carried out on the semi-submersible West Alpha.

The rig, owned by Seadrill unit North Atlantic Drilling, is being winterised at the yard in readiness for the controversial Arctic drilling effort due to be carried out by the US supermajor between July and September.

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