And your substantiation for this utter bollix is...?

I suggest you come over and buy spuds in Lidl, Aldi or Supervalu and judge for yourself. My substantiation of this is personal knowledge, and yours is   ????
Ireland imports 20% of her annual potato crop, mainly from the UK. (that produces 15 times the size of the irish crop). Despite this a comparison between what is on sale in an Irish supermarket compared to a british supermarket is pretty stark when it comes to spuds. Prove me wrong!