Does anybody know how to change the hinge runners? The (presumably) heat reflector plates welded on the sides would appear to prevent them from just dropping down in the normal manner.
That information was spot-on, thanks Mark. It’s actually a very easy job when you realise that you don’t have to unscrew all the burners from the hob top-plate!
Unusually, the instructions for raising the hob top are in the user manual to allow the user to change the gas jets to lpg.