On first impression, you might have thought that Unbreakablewas just a fairly desperate reality show cobbled together from I’m a Celebrity, Mr and Mrs, Taskmaster and It’s a Knockout.After all, the format is that people of varying degrees of fame – from Simon Weston to, er, the bloke who presents MTV’s Celebs on the Farm – arrive with their partners at what presenter Rob Beckett calls ‘a big posh gaff in the country’.