Arctic explorers get picked up

Polar explorers Pen Hadow, Ann Daniels and Martin Hartley have completed their epic trek across the Arctic.

They have been measuring the thickness of the ice in a bid to help scientists understand the changes taking place in the polar region.

At 1750 BST on Wednesday, two planes landed safely on the floating Arctic ice to collect the team.

BBC environment correspondent David Shukman spoke to Pen Hadow about the gruelling expedition.