Moles!!!!!

Those sonic things work if you can stand the sound they make, or shove something very smelly in the runs and they don’t like it. I have used Spearmint oil with good effect. Another trick is to either use children’s wind mills which vibrate as they turn in the wind or sink beer bottles in the runs and the wind blowing over the top of them makes a noise which scares them off.

Tried all of those bar the spearmint, now on the shopping list The last sonic one was useless, so bad it was uprooted by a mole hill!!