I guess the clutch is, for want of a better word, Kaput.
Hot; engine off, by a flick of the fingers, it rotates by maybe 2/3 fan blades. But, it also spins freely sometimes.
Cold; it rotates 2/3 fan blades, but never freely.
Engine running, it appears to be constantly spinning.
Now, I need to understand why the electric cooling fan is not doing it's job.
I'm hoping to swap the engine, but there is little point in putting a good engine in with faults.