Hi Jane
No, we don't have any template or exemplar for a professional supporting letter. Think about what you would like them to comment on, and make sure you talk to your Physio/Osteo first. The kindest professionals can sometimes say things that can harm a claimant's case because they may use language that the DWP/assessors don't understand, or it can contradict the evidence.
For example - a mental health professional once wrote in a letter for someone I was supporting that the claimant "is not well enough to work at the moment." We didn't send in the letter because we knew the person was never going to be well enough to work, yet we knew that one line would probably make the DWP assume his condition was short-lived and going to improve and therefore issue a short-length award.
If I can, I try to suggest to the professional what I need written for people (without hurting their feelings or questioning their judgement), and most are very happy to do so. They know their jobs, but most of them don't understand the intricacies of the DWP!
BIS
Nothing on this board constitutes legal advice - always consult a professional about specific problems