Media playback is unsupported on your device

Giant gas platform sunk: Time-lapse footage

5 August 2013 Last updated at 19:35 BST

A gas platform the size of a football pitch has been sent plunging to the bottom of the ocean, 200km (125 miles) off the coast of Norway.

It will house a giant compressor claimed to be the world's biggest offshore machine.

The Statoil equipment has been designed to pump some $30bn (£20bn) worth of gas from a depleted gas field.

Time-lapse footage shows the platform disappearing beneath the waves. Roger Harrabin reports.