Its more likely to be the element than the stat. The only way to be certain is to isolate from the mains and check the element, first visually as you can often see the damage, if not then electrically with a suitable multimeter or megger.
Bear in mind that as this is a dual fuel cooker you need to be extra careful with the gas connections.
In most cases it is possible to change the element without moving the unit at all.
Part number for element is C00141180.
That which can be asserted without evidence, can be dismissed without evidence.