Hi Ian
Just having had my first summer of success on my fledgling veggie patch, I am in the throes of planting now - garlic and Japanese onions are my two biggies at the moment.
Last month I planted spinach, turnips, salad leaves, pak choi and radish which are all doing well, but I don't know if you'd be a little late for these now..sure some expert on here will tell you! I also planted cabbage plants from my local nursery - not so successful, but at least the caterpillars enjoyed them
I intend to keep planting oriental leaves as long as poss in the greenhouse as I believe these will keep going well into Winter if they're protected in some way. Also radish grows so quickly that if this weather keeps up, you may get away with it. I'm trying the Chinese radish 'Mangtanghong' which apparently is good for stir frying as well as salads.
Good luck with the planting!