It's okay "howtomendit" people, I changed the element (£40), no joy, I changed the temperature sensor (£11), no joy, I then changed the main circuitboard (was supposed to be £95 but I got for £70) which at first did not seem to have fixed the problem. I then turned the machine off and then on again and held in the 2 No. cancel buttons which made the 70 65 and 60 degree LED's flash. I then turned it off and on again and loaded the dishwasher (and crossed my fingers).
I am happy to say I now don't need to wash up again.
Thanks anyway!!
Steve, August 2007