We live in a detached house but our side wall is in the back garden of one of our neighbours. So instead of a back fence, they have our house wall. Last week there was an almighty noise and we went outside to find our neighbours drilling into our house wall to attach some flower display things. They didn’t seem to think they were doing anything wrong but it’s not a garden wall, it’s our house! If they had caused damage, what would happen then? Would we be expected to claim on insurance?