Arctic thriller’s film crew struggled to find true frozen waste

Colin Farrell and his co-stars in the BBC's North Water shocked at the loss of wilderness at the north pole from global heating

It's a problem that, a century ago, anyone on a ship in the Arctic Circle just didn't have to worry about: where is all the ice? Yet this was the unexpected stumbling block faced by the film-makers of a forthcoming BBC thriller set in the Arctic in the 1850s.

The North Water is an epic five-part adventure about an ill-fated 19th-century whaling expedition into the Arctic. In the pursuit of realism, its producers realised that they could not rely on special effects. Nor would shooting it in a studio tank or off the coast of Britain achieve the authenticity of filming in the Arctic, however extreme the conditions and challenges.