Zanussi Aquacycle 1200XC FLE 1216W - Washing Machine?

My machine has trouble going through the wash cycle after accepting water but then mysteriously pauses or stops indefinately.
I have tried then switching off the machine and then restarting (this infrequently works) or then just trying the rinse programmes but again this is unreliable and often goes for a little while and then pauses and stops.
Can you help please ?