Dippy replaced by Whippy - bbc2

Over the past two years, the staff of the Natural History Museum has undertaken a super-sized challenge - to take down its famous cast of a dinosaur skeleton in the entrance hall and replace it with an equally impressive skeleton of a blue whale - the largest animal to have lived.

This documentary follows the teams of conservators and engineers as they take apart the diplodocus - known to staff and visitors as Dippy - bone by bone, ready for a countrywide tour and then get the whale ready to go on display - all without closing the museum to the public.

Narrated by David Attenborough

On balance, I'm not in favour. It's as if they cannot decide whether they want to be a museum or a zoo.

Dippy is only a plaster-cast

A advert for elf & safety and Scaffolding Hire