crimbo spuds

ive just got a pack of 6 seed potatoes maris peer,they also had pentland javelin and duke of york, £3 each         i intend to grow these in pots so when do i plant them and apart from the cold do they need any special treatment ive never grown them in winter before so any help gratefully recieved
if anyones interested they are from bennets hill garden centre near worcester

thanks yorkie will take a shufty