In case it’s of interest to anyone else, I saw Mike Hayton, seems to be very well regarded.
It also appears that you can bust a hole in the joint capsule and probably damage the sagittal band and have these things spontaneously repair given sufficient time.
Saw Jon Ostrovskis in Sheffield who said pretty similar things and has an excellent line in ultrasound scanning too. Well impressed by Jon, absolutely spot on in his assessment, can’t recommend him enough. Slightly more competitive fee structure than Mr Hayton too
So just a question of waiting patiently for things to heal. And not punching stuff in the meantime.