your circular fan element will have blown this is a standard fault that will happen on all fan ovens at some point .all cooker engineers will have come across this fault a thousand times
call in a local company as it is a basic fix. tell them the fault and get a quote before they come as it will definatly be the element so they can price up the part before you get them out .
expect to pay upto £30 for the part if they quote you more for the part you are being ripped
maddogmadox the cooker engineer, September 2007