Trust your gut instinct.
I love living in London and hope I never have to leave.
Terror attacks are very rare but terrorists usually do try to target capital cities to cause maxim fear and disruption.
I'm a female Londoner, live alone and travel in the early hours & after dark.
There are a few hot-spots for antisocial behaviour and some areas that must be avoided due to high levels of violent crime connected with gang feuding or drug dealing.
But over the last six years, I've moved all over London and rarely had any serious hassle.