john west++++ wrote:

he has written to the neighbour (who lets the house and is never there)
with no response. could he; 1. poison the tree and 2. push all the rubbish
away?

If said neighbour employs a letting agent or agency, then your neighbour
should contact them about the tree and rubbish, the agent will then inform
the landlord.

If not, the Council maybe able to help on the rubbish front.

Sarah