I've seen a few bikes on Hotukdeals in the last few weeks some varying from 100 - 400 but should i really spend more?
Having just returned from eastern europe where I did many a bike tour I realised how much i missed missing biking (something I hadn't done for about 8 years) I'm 20 now and have realised that i need to get some exercise.
I would be using the bike in an urban setting.
I did look up some bikes on halfords this one in particular: http://ncane.com/bg1
but having read a little most people recommend spending a bit more on a quality bike one that was recommended washttp://ncane.com/etg