Back up to 20th
with 628.3 miles for 49.99 L of Veg/Diesel
55mph seems to do the trick, even with the duff thermostat (looks like power steering pump removal is required to fit!)
Although Mr Bodine's post above is now making me think that I should call my local tame mechanic and get a cost for doing the cambelt- I've done nearly 4000 miles since 20th Jan...