Allotments 4 All

Read a reference somewhere here to a good offer from Marshall's but they sre sold out of brassica plants. Can anyone recommend another supplier of veg plants (not seeds) that I could order now for overwintering?

You could try these.  I had some brassicas last month and they were good and came quickly.
http://www.organicplants.co.uk/acatalog/info.html

... and they supply the seed companies with their organic plug plants, so you're going directly to source! ;D