Tristan. If your maple is Acer palmatum you really shouldn't prune it, ever!
You will do it more harm than good. A. palmatums in particular are very
prone to leaf scorch by the sun. Always keep your tree in the shade,
especially during the hottest part of the summer. Don't worry about the
damaged leaves this year, your plant will recover.

'Mungo'
----------------------------------------
"Tristan Hatton-Ellis" wrote in message:
I have a Japanese Maple in a pot, which got rather damaged due to wind
burn
last summer. I'd also like to give the plant a light prune to get it
back into shape. Any thoughts about when might be the best time - now,
when
drmant. or in spring?