[New shoot]

i have 33 lovely green cabbages  .... And 64 red cabbage are at the seed leaf stage with another 20 green coming up also.

BQ, that is a whole allotment plot full just of cabbage 

This may or may not work, but how about planting some plants the right distance apart - a double zigzag row is about the most effective use of space, like this

x     x     x     x
   x     x     x

then interplanting spare plants with a view to picking them young as greens (or reds    ),  as the main crop plants start to need more space.   You would have to keep the whole lot well fed and watered, but I think even loose headed young plants would yield some tasty leaves for eating 

[sunshineband]

That's a grand plan, New Shoot. 

[Beetroot queen]

Thats the plan i think. We do have three plots, hubby has one, i have one and dad has our third. However mine and hubbys is full and dads has so much to jam on it we may need multistorey ideas hehe
It will all wotk out in the end and if not.......... Well i have plans to plant cabbage on every motorway between here and scotland