'Whale' on the Thames to highlight plight of endangered species

The stunt was staged by the WWF to promote its 'the last 130' campaign.

With as few as 130 whales, including only 26 breeding females thought to remain, the western gray whale is teetering on the edge of extinction and their critical feeding ground off the coast of Sakhalin Island in the Russian far east, is now under threat.

It is six years since Londoners were captivated by the sight of a real whale in the River Thames.