In article ,
Sue wrote:

I want to plant some trees that I can keep small (say 10 feet high) in the
centre of my garden.Clay soil at the lower end of the slope.

Consider a crab apple and a damson/bullace - one of the older and
tougher varieties in both cases. Flowers in spring, fruit in
autumns (and you can use it!), and prunable more-or-less ad lib.


Regards,
Nick Maclaren.