UK Nuke-proof city...underground

[Jace]

All new apartment blocks, office towers etc in China (where I live) are supposed to have air-raid bunkers built into the basement. We have one in our underground car park at home, with foot-think walls and a huge door like you have on Hollywood bank safes. I haven't been inside, however I do wonder about the effectiveness and upkeep of it though, as the covers on the wall vents are pretty much rusted through, and it doesn't appear large enough to hold more than a few people (it is supposed to be big enough to hold the occupants of 16 3-bedroom apartments).

On the other hand, I have been reading about hardened underground bunkers being the best preparation for EMP strikes, so wonder whether underground garages would provide adequate cover?