Replacing grill energy regulator belling 932 farmhouse?

Hi
I have a belling farmhouse 932 dual fuel, the grill energy regulator is faulty due to heat from oven with faulty seal. Have found a spare one I think but how do you get to regulator and are they easy to replace.
This I think is the replacement-

http://www.partmaster.co.uk/cgi-bin/product.pl?PID=803688§ion=112742&brand=Belling&model=932%20Farmhouse&path=78825,112737:78826,112742