A couple of days later I went 8 miles. Sods law, the first 5 felt ok and then it started to hurt a fair bit. Not so good. I experimented a bit with trying to alter my stride it seemed to be no use. It just hurt and I felt pretty depressed when I finished. Again though, I readied myself for the ankle to be even more annoyed after having a nights sleep to think about it. But it actually felt fine. Dare I say it, even better.
I had an idea that a heel lift orthotic in my shoes might make a difference. The repaired part of the joint is at the very front of my ankle and is only about 3mm. In normal walking gait it's outside of the articular surface and therefore no problem now. It's only the last few degrees of Dorsiflexion during running that seems to cause the problem. So I made a hasty orthotic to try and went out for another 8 miles.
Much better. I still had to concentrate on my stride form like hell the whole way. The slightest drop in concentration or letting my stride get lazy and I could feel a few nociceptors firing. However, at the end of the run I felt like I could have kept going and the ankle was only mildly more tender and that settled within 30 minutes. Very early days, it could be totally different running on uneven surfaces, but it's a huge leap from where I was a few weeks ago.