Mere ground frost here in Thames valley, but white enough. Tops of spuds burnt even under fleece, seen worse, but not very often! They usually come back well enough. Last time a frost this sharp, >15 years ago the yield took a bad knock, but not so severely burnt this time.
Will they come again. I had frost on a crop about 12 years ago, it dug 5 boxes to acre. And headlands which were in 2 weeks later were totally unaffected and a good crop. So mine came around but only a third of a crop
Contract Lads have spuds on one banky field, facing South West. Top end was largely unaffected, the bottom westerly end, maybe 100m away and 5m lower, was wiped out. Never seen a better example of frost rolling down a hill.