The message
from Kay Easton contains these words:

In article , Spider
writes
A cotoneaster would fit the bill. There are evergreen and deciduous forms,
plain green or (a few) variegated, spring flowers followed by autumn
berries. I have several forms, all in heavy clay; they seem tolerant
of the
clay and either sun or shade. Good for wildlife, too.

In what way good for wildlife?

The nectar of c horizontalis and bulleyana attracts large numbers of
bees early in the year, and birds eat the berries, eventually :-)
Cotoneaster horizontalis tight against a wall is a favoured nesting
spots for blackbirds and wrens ime.

Janet.