BeverleyJB
A keen gardener friend of mine told me that moles hate vibration and noise. He used to part bury a glass bottle in the ground (with the top half or 2/3 above the ground) and put one of the children's plastic windmill toys in it. When the wind catches the windmill the sails going round creates vibration that passes through the tin into the ground. Cheap & cheerful and effective - also easy to move around.
Good luck!
I too have heard about vibration and noise.
Think the person I know used to mow the lawn around the holes a lot and scared them away that way.
