It finally gave up. I've bought a new genuine handle/switch from LR to fit tomorrow. The tailgate opens with key fob so reckon this is the fix. I'll post if it works.
Kind of. I had a look at the bit you pull up to open the boot. Noticed it was cracked. I peeled back the rubber and WD-40'd it to death, did that three or more times until the fluid running out was not black, left it to dry out then put the...