Long Johns are a must, then a pair of cord jeans. Thick socks & UGG boots. On top, singlet, 't' shirt, flan shirt, short & long pullover, parka & either beanie or balaclava, & woolen gloves. Don't forget the thermos of tea/coffee & eats.
But then our temps only get down to around zero to 1 degree C. on the coast.
As long as my feet are warm, I'm O.K.
Regards, L.
ps. I was born in the north of England tho. & I prefer the cold.