Carrots

Keeping a cloche over them will stop the leaves from getting flattened in the snow

They overwinter just fine without any protection, but can look a bit untidy 

Autumn King do best when sown in spring for harvesting in autumn onwards (if you can keep the rodents at bay!). An early variety like Nantes might be better for a late sowing next year.  I shouldn't think they'll do much more growing now until early spring.  But, I've over wintered young carrots in all sorts of weather for early tiny pickings - if you like tiny !