How do you demolish a North Sea gas rig?

Tom Wrigglesworth and Rob Bell follow the North Sea gas installation, the Lima platform, as it is pulled from the sea by floating cranes, brought back to Newcastle and then torn into tiny pieces for recycling.

They find out how the structural frame or "jacket" of the rig is felled using a method never attempted before anywhere in the world.

Find out more in Engineering Giants: Gas Rig Strip-Down on Sunday 22 July at 20:00 BST on BBC Two.