Do a couple of weeks on the bike before you go. My recent excursion back onto pedal power has highlighted that im not as fit as i once was, and that the saddle can be your enemy.
Loads of bike sout there, just take your ?200 and buy the best you can. Halfwits have a good range for trying out. Also have a look on here
www.evanscycles.co.uk
Edit:
http://www.evanscycles.co.uk/product...-bike-ec001097