The friday night ritual of driving to Derbyshire was particularly troublesome yesterday. The car decided to run hot all of the journey. I stopped a couple of times to let it cool down. No other symptoms other than a high temp gauge. The heater was working ok, electric fans were on, so I was confident that the coolant was circulating, "coolant" is probably a bit of a misnomer at the moment.

Worst case scenario was to breakdown at the side of the M1 on a Friday of bank holiday weekend. (although the RAC does seem to come out quicker for the Jensen than I can recall for my more mundane daily transport)

Strange that the temperature should be lower when stationary that at speed. I did manage to complete the journey, but after Leicester I switched to the B roads through Market Harborough joining the A14 about 1/2 way along.

I've been on a day trip to London today so not been able to look at the car, but I've been racking my brain as to possible causes. Faulty temp sensor or gauge, blocked radiator, blown head gasket......anyway I had a eureka moment today........the thermostat sticking!...it seems to fit all the symptoms....just need it to stop raining to prove the theory....I'll keep you posted.

I'm a bit miffed...the parts ordered from Cropredy didn't arrive today!