A little update on the Allie cantering issue - we have right canter under saddle now. Just. I am working my butt off with her on this. Natalie has been lunging me while on Allie so she at least understands what it is I am asking of her - this seems to have done the trick. We have had a couple of off lead under saddle canter circles too. She picks up the correct lead to the right about 90% of the time.
Her left canter is depart is lovely and the left canter itself is pretty good too - balanced and light.
We are getting there. :)