Should I ride my first fixie back from the shop (in London)?

I'll bet my experience of cycling in London against your's Ed. That's a shockingly complacent thing to say. It may not be as dangerous as non cyclists think, or cyclists from outside London think, but there are still considerable risks. There are new threads started almost every day about accidents, near misses or examples of how members only escaped because they have experience of riding in traffic.

I'd agree but in general, hearing from people comment about how unsafe it is in London to ride bike, it's generally never as bad as it sounded.

like how people hate black cabs because they're considered a bad apple, but in reality, a lots of them are decent, but it's always the bad apple that we remember the most.

you see what I mean?