It’s hard to conceive of a Britain decimated like that: half of everyone dead. Imagine every Christmas watching repeats of the And Wise Christmas Special. Imagine The Proclaimer. Imagine Torville. Imagine Bake Off without Sue, rather than without Mel and Sue. Imagine the Krankie. Imagine Edward (Jedward without John). Imagine Gregg Wallace on his own in a half empty kitchen with just the forks and none of the knives.