In the middle of cooking the Sunday dinner the house tripped off (Earth leakage - not overload). After several re-sets I concluded it was the top oven (- Electrolux EDB701 - double built under). The grill elements were not causing the problem so I concluded it must be the element in the bottom of the oven.
I tried to heat up the bottom oven (fan assisted) and it wouldn't operate (but didn't trip)
Later - I tried the bottom oven and it was fine.
After we have cleared up and washed the pots - or maybe tomorrow I will try the top oven again. In the meantime - any clues?
I'm not sure of the form of the bottom element - the base of the oven cavity heats up.