hi guys just a tip for you if you buy a cheap bike somewhere. Usually i take the bike to halfords and get them to build it up for me - halfords stores seem to vary in how much they will charge you so worth calling different stores - but one local store seems to have come up with a bright idea. basically pay them £19.99 which gives you 3 years warranty on the bike (or 9.99 for one year ) and this means you only pay for parts and halfords pays for the labour on the bike. However my store class's buiding the bike for you as labour and so you only pay £19.99 and they will build the bike and you get 3 years warranty where you only pay for parts - a cracking deal. I have the bike warranty and use it all the time.
im not sure if all stores will allow you to do this as i think really you should have to pay to get the bike built and then get warranty for it (doesn't have to be a halfords bike) but my store is allowing you to just pay for the warranty and they build the bike up free - hope this makes sense!