Received this email from a Mr K Allan living in Germany:
This acer is not yet in a garden as we have moved to Germany. Hopefully soon it will find a new home.
Meanwhile, could you please help with the possible variety as I cannot remember.
Its 2MB, sorry, I did not compress it to keep the quality and detail.
I had to reduce it to allow it to be published on this forum. Its very good quality, so hopefully will be good enough to allow ID
(When I get a few minutes, I'll cut a piece form the photo to make a close up of the leaves and stems and post it here)
Any suggestions?