Why are these potatoes black under the skin?

in Plants
I peeled a few potatoes and all but one of them have areas of black on them. I think it could be bruising caused by rough handling, but I am just guessing. I think they are Maris Piper. The black areas are not all the way through, but I have to peel about 3 or 4 layers off to get beyond the blackness.


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Gardening in Central Norfolk on improved gritty moraine over chalk ... free-draining.
It has happened about 3 times/purchases now, so I will email the SM. I had put up with it the first couple times as they are cheap enough. It is becoming annoying now, and time consuming peeling them down to undamaged flesh.
Gardening in Central Norfolk on improved gritty moraine over chalk ... free-draining.
Well at least my conscience was clear😕
”Don’t worry” said a Vegetable Manager ... “they’ll soon ripen under the lights”. 🤯
Gardening in Central Norfolk on improved gritty moraine over chalk ... free-draining.
Gardening in Central Norfolk on improved gritty moraine over chalk ... free-draining.