Hi Paul, just located and tested the exhaust thermostat you mentioned and that also has continuity so now I’m really puzzled. Would it be worth retesting the inlet & exhaust thermostats with a heat source (hairdryer etc) to see if they will go open circuit?
(0312 447 15002/1)
heater element -ok reads 47ohms on both (no s/c to ground)
inlet thermostat continuity- ok (0.03)
safety cut-out stat (red button)- no defined click but will read open and closed
– exhaust stat – not checked

This video will show you the basics of tumble dryer heater elements The heaters on tumble dryers differ from make to make and even model to model. They can be located in the front of the drum or at the rear of the cabinet, but they are all controlled by thermostats or thermistors that switch

If your tumble dryer is not turning it is usually one of these three faults.This video will help you with all these makes of Tumble dryer Ariston, Electrolux, Ignis, Indesit, Neutral, Tricity Bendix, Whirlpool and White Knight that are struggling to turn? It’s likely to be a problem with the capictor or belt.the belt may

    hi Graham yes this is the part you need link is below and below that you will find that i have uploaded the full Exploded parts and wiring diagram for White Knight see model below made by Crosslee. White Knight Rotary Sensing Air Vented Dryer – UK 0312 83A 15000 – 83AW (White) 0312