Well, I bought a new thermostat from my local Jeep dealer when I was at home over Christmas but only got it fitted this morning. It took the guys about an hour to do, they charged me twenty euro and I now have a nice warm Jeep! It reaches full working temperature, i.e. temperature gauge needle just below the mid point , in about ten minutes just sitting idling which is has never done before, and the heater works as well. Result!
