Hello Mark,
Oh ok, there is a company called Battery World, I should have taken it to them to test the battery in the first instance, I'd say that battery would be well and truly cooked by now.
I have managed to source another battery, slightly blemished but still safe and good.
Yep, not wrong about the short to earth, certainly had me off that mower very quickly. Rewire should not be too much of an issue now, as you said, best to do some dead testing on the OHMS range, I purchased a new multimeter yesterday, it has continuity with audible sound function.
Next week hopefully will get that battery and hopefully wires will be sorted.
Merry Christmas.
From Bondy