The problem happens with both fan and convectional settings (the fan is definitely going round though because we can hear it and feel the 'wind' with the door open).
We're not sure if the grill is even reaching the correct temperature but can't be sure of that setting.
We do not have a multimeter. If we buy one at B&Q tomorrow and then try what you have suggested, can we rate you after that please?
If so, how would we use a multi meter?
We've just turned on the grill and only the centre element of the top element went red hot, does that mean that the outer element is therefore not working and it is therefore the top element that is at fault?
I'll also try the base element when the oven cools down.
Ok, I've just turned on the convection setting and kept my hand on the bottom of the oven and it didn't get hot at all. Could it be both elements gone?
Is it easy to change the base element?