User blog comment:Tessitore/An underground city in 1983:Doomsday/@comment-86.29.228.137-20100813230427

Okay, how does this sound. On Doomsday, a sizable percentage of the population of Corsham and other nearby towns manages to carry out their plan to get into Burlington before anyone else, either by overwhelming the guards or just being let in (by 1983 it was obvious that the people Burlington had been made to protect probably wouldn't be able to get there in time, so there wasn't really any point in not allowing them in), with those who couldn't get in either taking shelter in other underground quarries or taking their chances on the surface. They stay down there for as long as possible, sending out scavenging parties when supplies start to run low, until it becomes obvious that they're going to have to start growing their own food and/or people can't take being cooped up anymore, and they return to the surface. Due to the communications equipment in Burlington not working, they have no contact with the outside world after Doomsday, leading people to think everything else is destroyed. This proves to not be the case shortly after they come back to the surface when they encounter people from other survivor communities, one being the town of Chippingham and another being the city of Bath which went into city-state mode after Doomsday. An alliance of some description is formed between the various towns, which are still cut off from the outside world. Burlington is largely emptied of inhabitants as everyone returns to their homes, except for a few people who stay down there to maintain it (and in some cases because they've developed a sort of surface-phobia due to the trauma of Doomsday), but due to the area being rather lawless, it becomes the local stronghold/bolthole, rather like a subterranean castle.

Yeah, I know it needs a lot of work but it's a start. A lot more research in required. Speaking of which, I don't suppose that there's a map of targets hit in the UK? I've had a look but I couldn't find anything.