[quote=Ollumhammersong]
Well vault-tec was an American company. More than likely the rest of the world didn't have vaults anywhere close to that. But London being London most likely had various bomb shelters left over from WW2 and seeing has in fallout lore the threat of nuclear war was becoming so real that the government probably saw fit to expand on those bunker, reinforce, build more, etc. Coupled with the extensive subway system I think it can be worked out. I think we should focus on life existing within the underground. Have the surface like an irratiated no-go zone. Small groups go up to hunt for supplies but they always go back down because the air on the surface is to polluted/ acid rain is frequent/ mutants etc. I think if we are limited to short term excersions on the surface it makes it just that much more interesting when we are forced to stay up there longer for whatever tragic and life threatening reason.
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That sounds too much like Metro2033 to me. I like the idea of most people living underground, not everyone though. I think it should be more of a safety reason for staying underground where it is easy to protect people, plus some safe zones within the city. Such as the palace (Long live the King), maybe the Olympic grounds as well, I mean that in itself could be a small city. But with Bandits, Raiders and beasties scouring most of the city the safest place to live if you can't afford entry into one of these zones is in the underground.