right i had a quick look when she got back in the car, i think only 1 of the fans are coming on. I can feel air behind right fan (looking from front of car) but not behind the left hand fan (but it is quite hard to get my hand right down as the manifold and hot pipes are in the way).

Also decided to remove the top boost pipes for the front mount to give them a polish tommorow, and i had to remove the air filter hose from the turbo to get to a jubilee clip on the boost pipe. Whilst trying to refit the air filter hose i felt a drip on my hand, turns out the small pipe that comes off the larger rad pipe and goes to the turbo had a small pin prick hole in it and was letting coolant out. I trimmed a couple of mm off and refitted. Hopefully that explains the dried up coolant around that area and its nothing to do with the stat housing at all.

I have squeezed that pipe from the rad to the stat and it's not rock hard, feels how a water pipe should when the cars running.