Throughout the year I occasionally potatoes from my local supermarket (for
cooking purposes) and after keeping them for a while, sometimes they start
sprouting. If this happens, does it mean they are suitable for planting in
the garden? I live on the South coast of England, with its fairly mild
climate, if that's relevant.

I would assume the answer is "yes", but I'm asking this because I've never
heard of anyone planting spuds from the supermarket.

TIA

Al