This one turned up with my usual feeder gang of starlings - ground feeding.
My first thought was juvenile Magpie but the pink beak and legs are throwing me slightly.
All the images I can find of juvenile Magpies have black legs and beak..
RSPB bird identification app is no help either - also thrown by pink legs and beak it seems.
If you (RSPB) wish to use these images please feel free to do so.
Later the same day I also spotted an adult. Nothing more since though.