I'm really sorry to hear that you're not going to be able to walk for a while. As a walking-obsessed individual myself, and having had a threat to my ability to walk in the past (thankfully, now in some kind of remission) - I can really empathise with just how miserable the prospects might seem just now. Hopefully, though, you'll soon be plodding up Arnside Knott again. I'll be keeping my fingers crossed anyway.
Whatever happens, Dave, good luck with it.
(You have to read the website to understand this post girls and boys...)