Peter you might want to try Salonpas patches on the ankles.
I use them alot for my OA. Sometimes they will work in one day!

I use the ones with methyl salicylate in them. Even on fingers and toes. This past week I am doing mortar work on a rock wall, and my right hand is having problems at night. I just cut them into strips and wrap around the affected finger(s) and next day they are much better.
There are several types, this is the one I use:
http://www.salonpas.us/salonpas.php
These should be available in Australia, since they originated in your part of the globe...Japan I think.

I have problems with the left ankle..since I had a steroid injection done by a less than adequate podiatrist there. It can flare up and hurt for no reason. I'd be lost without Salonpas.

I think folks should try non invasive remedies first, before going big time with the scalpels, etc.

I do agree, trying non invasive means first is the best thing to do. I, however, had gotten to the point where ANY walking was extremely painful and my ankles were constantly swollen to twice their size. I missed out on a lot of living. Age also makes a difference when ankle fusion is considered. I was 53 when I had mine done, which is pretty young for such a drastic move, but without that pain, I have been given a new life.

Thanks this has been a very helpful thread.

Donna