Moles have invaded my walled garden. They are under the lawn, under my rose bed and under my flower borders. I have tried various methods of getting rid of them but all to no avail. They are no longer making hills just holes which when investigated go DOWN DOWN DOWN AND UNDER! Any suggetsions please.

Any possibility of attracting badgers? They'd be happy to eat your moles. Of course they might move in and then you'd have badgers instead.