There aren't "no go" areas in London, but there are areas I wouldn't go into wearing a suit and tie, or if I was a woman.https://twitter.com/standardnews/status/779321433130471425 …
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main routes are OK, side streets west of Paddington I've found iffy. S. London I'd be more cautious, but that's cos I don't know it.
Actually, refreshing my memory (few years since I was in London regularly), Poplar I would have expected to be OK.
never been close to trouble in any *area* of S London, but I'm sure there are specific places which'd be dangerous
My theory is if you are "at home" in an area it gives you a confidence which deters potential predators. But that could be a delusion
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