I had an X-ray of my ankle done this morning. It turns out the Manchester Royal Infirmary registrar who told me I hadn't broken it, just sprained it very badly, was mistaken. There was a fracture to the lower part of the tibia and the fibula, and although over time, the bone has healed, it has done so in an erratic fashion. There's a protruberance of new bone growth, and that's what's causing the continued pain, swelling, and restriction of movement I've been complaining about for the last 2 1/2 years. I have now been referred to an orthopaedic surgeon with more than 30 years experience, and he'll see me on April 4th. It's very likely I will need surgery to correct it.
Meanwhile, I'm to keep up with my exercises for another three months in an effort to sort out my chronic tendonitis (which by the way, is starting to feel better).