Found the problem. Had removed the door to clean oven and not re-fitted correctly. There is a cut-out switch behind the RH hinge. Have re-fitted door correctly and oven is working again.
I have a SMEG oven (model SE378MFX5) which is about eighteen months old. It has been used quite a lot and I have mostly only used the fan cooking option which relies on one of three elements which is in the centre of the oven. About two weeks ago this element stopped heating up so I carried on cooki...