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

At what? Because you obviously think my question was hilarious and I don't find you equally funny?

I don't have any beef with you, I was asking a genuine question considering a. I don't live in London and b. Have never ridden a fixie, and then you just proceed to take the piss out of me. Fair enough it may be funny to you but I was just looking for some helpful answers (which I have got, in fairness).

We all know your serious and the worry you have is sincere, but it's a funny question. If you have a brake just ride the bike. If you have been mountain biking for years, it's pretty surprising that you would ask a bunch of cycling people if you should ride your bike or not. Seems like you should HTFU and just make a decision yourself. If you ask a silly question you get a silly answer.