thanks for your replies.
Its been a couple of weeks since my previous post and I have been able to do a couple of short runs, 3m last Saturday and 5.5m on Monday - i can now put my full weight on the foot with the AT problem, but its still pretty sore afterwards and my calf muscle is now rock hard and aching (pain seems to be gradually creeping higher up my leg).
Daletown i ordered some Serrapeptase as you suggested and have been taking it daily for about a week. I'm seeing quite alot of improvement but as you say its difficult to know whether its coincidental and it could be as much to do with a few nights in the plantar boot, ongoing alternate ice and deep heat and plenty of rest. I guess i'll never know whether the recovery is due to one thing in particular or a combination, i'm just so relieved to be able to run again (albeit slowly and cautiously)
Jez - thats weird, i guess you'll just have to run more to relieve the pain?!