How can I fix my Zanussi Jetsystem Turbodry 1200 washer/drier?

I have a Zanussi Jetsystem Turbodry 1200 washer/drier (WJS 1265W) which is:
a) not drying
b) not spinning at high speed
c) making a noise like the motor is freerunning (loud wailing noise) when trying to do a highspeed cycle.
I suspect all the faults are related, as it all started at the same time.
The thing looks damn-near impossible to get into - any help would be appreciated.