With regards to obtaining any orthopedic assistance from the NHS forget it!
In my experience I was told to take my son to (16) to an Orthopeadic consultant privately and that under no circumstances would NHS pay for this specialist advice.
Very foolish and short sighted NHS policy in my view.
I also have chronic back trouble and find I can barely wipe my own posterior in the mornings!
I sometimes feel that my back is about to collapse completely.
I wake up regularly at 3 am or so, in great pain.
I do not like taking Diclofenac as it causes terrible stomach problems so on and off take C0-Dydramol (but try not to as I fear becoming addicted and too reliant).
I have had a disc partially removed a few years ago but have had probs since childhood on and off (often with muscle spasms down back).
I have one very useful tip, at least one that does help me a great deal.
My wife bought a large, firm sponge tube from IKEA a while ago for the head to rest on on the sofa.
I tried using it at night to rest my legs over (its about a foot in thickness). It rests under my knees.
This seems to really relax the lower spine and keep it flush with the mattress surface. I have an idea it even - very slightly - stretches the spine and assists lymph drainage amongst other things.
I have found this a great, great help. Wake up with much reduced discomfort. Extraordinary discovery but not a total solution of course.