I’ve had this cooker for about 5 years and it’s been fine. Over the weekend the fan oven has stopped heating up 🙁 . The fan comes on and the gas ignites, but over an hour on gas mark nine and its just warm. The other non fan oven is OK. The model is 111WGR but in repairs@, belling is not listed. Can anyone suggest a repairer in the WN1 area as there are a couple of other things like the hot plate not working and back hob not igniting. Thanks