Thank you for your consult at DoctorSpring.com.
I agree that physiotherapy will help in scoliosis and has to be sustained. I also feel, as per your clear history of Inflammatory back ache; requires investigation in form of MRI of SI joint and Screening MRI of Lumbar area and HLA B 27 by PCR. I would strongly suggest these two test and exercises.
Hope this helps, please feel free to discuss further.
Notes: Inflammatory back ache since 2001, undiagnosed and not investigated for SPA. With Scoliosis and osteochondrosis. Improvement on activity. Functional grade Moderate Disease activity. No Peripheral arthritis/ iritis/ Psoriasis but history of IBD/ IBS. No family history of SPA or similar illness.