The car is off the road for the winter.
After having to replace the coolant hoses I also replaced the radiator with one from pro alloy. I would have bet my house on there being nothing wrong with my radiator as the system was always maintained/ flushed through out my ownership, however the temperature control is perfect now. I concede also that the heater matrix requires replacing as the heat from it is poor.

Also replaced the fan with a Spal one. The original wasn’t happy at low speeds through the PWM control.

An 11” would have be perfect but my son had this 12” he bought and didn’t use on his 450 hp DC2

The temperature falls almost instantly when the fan starts.

Managed a few shows.