Stuck battery bolt

[Grahamm]

you normally get new nuts and bolts with a new battery i wouldnt worry about the old bolts if you have cut grind or sheer them off then bin them ,

Yes, there are new nuts and bolts, but the main problem is simply getting access to the bolt (and, as mentioned) there's the connections for the Sat Nav and Heated Gloves which I'd prefer not to destroy.

I may try the Dremmel tomorrow if it doesn't loosen up with the WD-40, if not, I think I'll have to drill it out.