GLWS Mike - looks a lovely example.
And you have my sympathies on the back issues. I broke mine many years ago playing rugby, but after an operation, made what appeared to be a full recovery. But now, 30 years on, it’s coming back to haunt me. Worn vertebrae and thinned discs being the issue for me in my lower back.
Diazapan and a lengthy drive (as a passenger) in the Range Rover is the cure now. That car has the most amazing seats, with proper lumber adjustment and a massage function. It sounds silly I know, but half an hour in the Rangie makes a world of difference if I’m in pain and in a “frozen” state. (Not necessarily easy to get in or out though, when in that state.)