It is very likely the Control Switch to the Rear R/Hand Hotplate is at fault and I would imagine that as the oven is around 7 to 8 years old, the Grill Element must have gone rather than its switch control?
Thanks Martin
I,ll Change the switch selector for the ring ,
with regards to the GRILL I noticed there is also a thermostat inside the grill compartment at the rear could this be faulty ?
Thanks again much appreciated
John