I just wanted to say thank you to all those who read my original post. Things have moved on since then, thanks in large part to the dediction of my physios. One major factor in improving my walking abllity has been the introduction of my wearing a SI joint support belt (Serola) which has significantly reduced the ache in my hips. I definitely feel more secure and confident in movement. Sitting is still problematic but from my experience i would definitely recommend anyone trying this support belt following a spinal injury such as mine.
I am currently in the process of having assessments by the government 'Access to Work' scheme and by the occupational health organisation used by my employer. It looks hopeful I'll be able to return to work on a graduated support programme from early September.
I am more positive and perhaps more realistic about getting back to normal activities.....although i think the gym will have to wait for a long time!!
Regards xx