Okay folks,
Sounds a bit daft, but I cannot find the temperature sender on the engine anywhere. There is a 3 pin sender on the stat housing, but that's for the fan I believe. Any ideas where the little tyke is hiding??

Hi and welcome to our forum

The fan switch is either on the radiator or on the thermostat housing.

The coolant temp sensor is usually on the thermostat housing or in that area.

Good luck.