My condenser dryer makes a ginding sound when it rotates anti-clockwise its OK and quiet rotating clockwise, anybody any ideas please??

I would say that you probably need to tear it down in order to clean it and lubricate the bearings with white lithium grease. It does not take a lot of dirt build-up to make this unit quit working as you not only have the heating components but also the components that condense the water. All bearings need to be greased and all air passages need to be cleaned out along with the condenser coils and fan.