Who says British television lacks imagination? You might have thought, for example, that every possible combination of comedian and travel programme had been exhausted long ago. After all, it’s now 26 years since Michael Palin set the trend by following in Phileas Fogg’s footsteps (sort of). In more recent times, we’ve had Stephen Fry going round America in a London taxi, Billy Connolly going round Australia on a Harley-Davidson trike and — perhaps drawing the short straw — Ade Edmondson going round Britain in a caravan.