On 22/08/2015 19:56, Another John wrote:
Our plum, now about 6 years old, is getting bigger (what a surprise). I
guess that the body of the branches would be about 15 feet high
(tallest, longest sprig grown this year), and about 10 feet wide.

I'm thinking I'd rather have it in a different part of the garden: is
it feasible to move it, this winter?

It's certainly possible. What do you mean by feasible?

https://www.youtube.com/watch?v=qqKTkYDMN3M

Andy