Variety Advice Needed Please You Brilliant Lot!

[Berr]

Cabbage Golden Acre does well at smaller spacings. You can determine their size at maturity simply by varying the spacings. Experiment!

[Two_Sheds]

varities that cam cope with close spacing. I particularly need to know ideas for cabbage

Well, some grow tall and pointy, and some grow fat and wide. Savoys are huge, typically taking up 3ft each plant.
For small cabbages, you need something like Primo, Duncan etc, and remove the outer leaves if they get too big or holey