Thanks for the reply's guys
euromodder;
no not imp. mpg us mpg getting nearly 52mpg imp
I will definitely be fitting the switch to try it out, during temps below 15c my engine can take 20mins or more to heat up! When the heater kicked in last winter it could heat the engine up in less then 2 mins and considering most of my driving is in town it should make some sort of a difference
Andy