buy a standard 240v room stat,i'd tend to stick with acl/drayton or honeywell, but they're all pretty much the same in the way they work. wiring instructions for the particular stat will come with it, it'll be wired into the wring centre and that can be a bit of a minefield if you don't know what you're doing, so might be best to have a qualified engineer to look at it. also consider a wireless stat, that way there's no long cable runs from the wiring centre to where you want to fit the stat.
Ian, August 2009