Big Brother can claim to be the parent of modern reality shows. It started in 2000, suitably dystopian as we looked into the black mirror of an intimidating new millennium – and dozens of other brutish, tacky and vaguely exploitative contrivances followed in its wake. Two decades later, though, it’s a heritage format. Big Brother was canned by Channel 4 in 2010, then cancelled again by Channel 5 in 2018, supposedly due to low ratings. If you’re not rating highly enough to survive on Channel 5, your brand is at rock bottom.