Hi G. Gnome
Good advice from Plumpudding.
To save time thinking (for me that is), here's what I sowed and grew over winter in the polytunnel last year, with sowing dates.
25 August 2007
Chicory, Green and Red
Miners’ Lettuce (Claytonia)
Japanese Spring Onions
2 September 2007
All the above were sown in modules and planted out as and when ground became available.
12 October 2007
Sown direct into the border.
There is some useful advice on endive and chicory HERE
and on pak choi and other oriental brassicas HERE
PS All did well over winter, and the Cavolo Nero and Kale are still in and cropping - and tying up space!
Hope this gives you some ideas.