I did actually and forgot to post an answer. There is a dial beside the clock which had been knocked. When I put it back to the hand, the oven started working. I think the hand is manual and it had been set to timer. 
YOu can download the manual here:
http://www.serviceforce.co.uk/pdfs/U02249.pdf
I hope this helps.
Paul
                
 PaulD
                
 February 2005