On the latest episode of The Great Sport Relief Bake Off, Geri Horner, Louise Redknapp, Jermaine Jenas and John Simpson whipped up a selection of treats for Mary and Paul.

But while the celebrities got confused over their beetroot and chocolate traybake, Twitter was in a complete muddle over whether it really was war correspondent John Simpson or in fact naturalist national treasure David Attenborough.

John Simpson
John Simpson said the show was scarier than dodging bullets (Ian Tuttle/Love Productions/BBC)

The excitement was palpable when everyone thought it was Attenborough.

But then disappointment set in.

David Attenborough
THIS is David Attenborough ( Helen Atkinson/PA)

Conspiracy theories now abound.