hi, guys. i just arrived in london from australia after a few months of roaming asia. anyway, back home i cycle everywhere, i don't want a car, i hate public transport and i love flying down the road on my bike. i need to find a bike that i can ride around london, primarily to work and back which will be somewhere in central london and involve me chaining it up outside a restaurant from early in the morning till past midnight. i was just going to buy something good but seeing mangled bikes and lone wheels chained up all over the place has me a little worried about that. so i'm hoping to get something cheap (maybe second hand? ) the most important thing after price is that it will cope with being ridden hard. are fixed speed bikes a viable option? i've never ridden one and thought they were stupid but there aren't really any hills in london and from what i've read they kinda look ok. is there somewhere i could get second hand bike that isn't just an expensive hipstermobile. anyway, the lack of a bike in my life is making me depressed. please help me.