Ok. Job done
With this unit being a built in one most enquiries I made, I was told the majority of Belling built in ovens, the elements are accessible from inside the oven.
Not in the case of this oven, typical...lol
U do need to disconnect the power to the oven. I know stating the obvious.
You do need to undo the 2 screws that secure the fan and element cover plate and behind this there is 1 screw which clamps the element down.
You will then need to remove the oven from its cabinet by sliding it forwards, I slid it onto an old table to work on it.
Then remove the 4 screws securing the back cover and carefully move this to a safe place as the junction box is still attached to it.
The element is secured with 2x8mm nuts. Disconnect the 3 wires, noting the orientation, undo the nuts and remove the element.
Refitting is a reversal of the removal process.
This process looks like it also applies to grill element, although the grill element wires and nuts do look a bit more akward to get to.
Hope this helps somebody.
I am NOT a qualified electrician and I will not be held responsible for any damage or injury caused. So use this advise at your own risk.
Eddie (Original poster), February 2008