Cheers hammerong, that is next on my list

Thermostat should have been first.

£400 is about right, maybe towards the high end though. No need to get rogue traders involved just yet....

Just a quick update.

 

A couple of weekends ago I decided the anti-freeze needed replenishing and while I was in my local car parts store getting the a/f I picked up some rad-weld. Tried it when I got home and since then the water level has not dropped at all. 

Keeping my fingers crossed that it's not a fluke!

 

Catman