Accessing rear lugs on Rangemaster?

I am trying to tighten a couple of loose lugs and also replace one that has fallen off the top of my Rangmaster Elan 100 Dual Fuel. They are the lugs that the top plates rest on (removable ones that the pans go on). I can access the side ones but those in the middle seem inaccessible unless the whole hob top comes off. Is there a way of lifting up the back part to access the nuts below?