I wanted to keep updating this thread in case it is useful for someone in future.
I am now 12 months post surgery and walking for an hour plus a day. Still have my cane as I am usually on my own but, I can usually walk unaided over most terrain. Still avoiding slippery surfaces and steep hills which feels sensible.
My ROM is at about 135 degrees (although I don't measure it routinely) and I am still seeing marginal gains which is brilliant.
Amazingly, the bone is still not quite healed yet which my surgeon said is perfectly normal given the extent of the injury. I also have a very minor step on the surface of my knee joint (tibia end) which is not optimal but, hopefully will heal further and not cause any immediate issues. Knee replacement still very much a possibility for the future but hoping to get a good few years before this.
Pain is so much better. I still have to be very conscious of not doing too much and have a degree of pain and stiffness each day. However, it is much more manageable and always improves through elevating and icing. Reality is I am adapting to my limitations and continuing to exercise with a focus on obtaining more function and recovery.
Next part of my recovery plan is waiting for all bone healing to complete and then on to removing some of the metal work. My surgeon is convinced that the majority of my remaining pain is from the vast amounts of metal irritating my leg. Hopefully this is the case.