there is pretty severe rust in my battery tray, is this an mot failure and if so can i just cut out the worst of it out and bolt in some chequer plate until i can get someone to weld it up?
Or you can do as you say and cut it out and weld it up.
Mine was pretty rusty but not totaly gone so I put a sheet of glass mat into the battery box and fibreglassed it all, I welded two supports accross the outside and will fibreglass the outside too.