I have a Potterton Prima F boiler and the original Potterton PRT100 dial thermostat in our living room. The thermostat is basically up the swanny and you need to turn it right up to 27 or 28 degrees to make the heating come on. I hate to think how much it is costing me in gas bills! So, I've decided to buy a new thermostat and would like a recommendation from people wiser than me! My number one criteria is it must be easy for a cack-handed idiot (that's me) to fit. My budget is up to £50. I also have a timer (very old and ropey) next in the airing cupboard. Ideally I'd like a thermostat with a timer control, so that I don't have to worry about using the old one. Any recommendations would be gratefully received.