Sowing for Autumn/Winter Harvests

Every time I consider growing in the gh over winter, I'm disappointed. The frosts kill anything tender I grow and if I put something like chard in the borders they only seem to take off in spring when I want to  clear the space for putting up staging/sowing/planting. I have some beans and carrots sown in MFBs just to extend the season and I may sow some chard in pots to see how they produce, but you need and awful lot of pots of chard to get a few meals out of them. The upshot is.... I don't bother.

Trotting out those old excuses again, JJB.
Throw some fleece over your plants when frost threatens. You know you'll wish you had, at least, tried. There are winterhardy versions of many veg that you could try.