As an update, I have just started physiotherapy to strengthen the muscles and tissues supporting my shoulders.
From the way the exercises feel, they are targeting weaknesses which obviously need strengthening, but not explicitly (yet) the muscles which were interfered with during the operation.

My physio seems unaware of the unique stresses caused by climbing, and I have been asked to document my plans for when I start climbing again (as detailed earlier in the thread. She would like to plan for tailoring the therapy to these actions, but I am a bit lost for words.....
"I need to be able to pull, or push with my arm in any position" seems to be an accurate if perfectly useless description of what I aspire to doing again!
If I was rowing a boat, or doing archery, it would be reasonably easy to describe the actions as they seem reasonably simple and reproducible, but for rock climbing the arm and shoulder actions seem to be more complex and non-routine.

Could anyone help me put climbing in physio speak.....
Any specific muscle groups need particular attention?
Any specific risks as a result of the laminectomy which physio could mitigate?
Is there any physio / medical terminology which describes how I am using my shoulders?

Having worked professionally with a number of different professions, I appreciate that different groups have different 'languages' and if I can explain my needs to a non-climbing physio in 'physio-speak' I feel it will help us both get the treatment right.

Many thanks for reading so far, and all help gratefully appreciated.