Tried again for W3R2 today, hoping a day was enough for my left heel to have made some effort at healing, and making the most of the warm, not-so-windy, day.
I did eventually make the whole run, although since my left heel decidedly hadn't improved, the walking parts were done at more of a speed-limp. Oddly enough, my heel *didn't* hurt while running, presumably because of a difference in the way I move so it wasn't rubbing on the back of my trainer.
Having had a good look tonight, I think tomorrow's rest day is much needed, since I'm now missing a tiny patch of flesh and it stings like something really stingy if touched.
Unattractive limping and foot-swearing aside, I was happy with the run, although I still need to get my breathing sorted so I don't end every run looking and sounding like an asthmatic beetroot.