I'm currently writing a novel in which the hero's wife is a keen gardener
(probably a member of the RHS etc). Would anyone here be willing to give
me
advice as to what she might have in her garden (upper middle class, near
Hampstead)

What she might have in her garden?

Moles digging under the lawns leaving their little piles of earth.

Badgers burrowing under the banks and boundaries. (And the Tennis Court as
my daughter has found)

Foxes making a noise/racket and killing birds/poultry etc and leaving bits
behind.

Leaves etc in the outdoor swimming pool.

People walking across the land who have no right.

Thieves digging up the border hedges/shrubs just after they are planted.
(Daughter and Son in law had £400.00 shrubs pinched within 24 hours of
planting!!! Someone in the know????)

Not 'Everything in the garden is rosy'

Mike