Have had a autoelectrican look at it. Resistance of all sensors was fine, but the ACV's were all over the place.

NSF - 2AC Volts
OSF - 100mAC Volts
OSR - 4AC Volts
NSR - 13AC Volts

When I cleaned the reluctor rings on the fronts and changed the OSF sensor, the ABS light goes out but the pedal pulses when pulling upto a junction.

Then I replaced the NSF sensor and the abs light goes out and the pedal is no longer pulsing. However, when I pull the handbrake on, after @ 10 secs the ABS light comes on but goes off when the handbrake is released.

Any ideas as the car is booked in for its MOT tomorrow?