Mole deterrent!

Visited a friend today about some sewing and saw this windmill in her garden.  Assumed it was to amuse her great grandson, but it is to stop the moles - apparently the vibration from it puts them off.  Don't know what happens when there is no wind!
Didn't manage a blip yesterday.  Potted up the plants and did a lot of sitting around in the garden in my new recliner and blip got put on the back burner.
Going to London tomorrow to see QI being recorded so may be back blipping.