Short list, and there is no point padding it.
Chard Green Broad is the star. Sown in spring, it picks through frost and keeps going until it runs to seed the following March. One row, most of a year.
Lettuce Mix under a cloche or on a windowsill cuts slowly all winter. Slowly is the word — growth almost stops below about 5 °C, so you are harvesting what grew in autumn rather than growing anything new.
Giant Spinach sown in August or early September stands through autumn and picks into winter in a mild year. In a hard one it sits and waits for spring.
Green Peas Petit sown in late October or early November overwinter as small plants and crop several weeks ahead of a spring sowing. This one is a genuine gamble: the enemy is not cold, it is wet. On heavy clay they rot. On free-draining ground they are one of the best bets in the gardening year.
Everything else on this list is finished by November, and pretending otherwise only wastes seed.
