Good luck with your Plot Sparky! Agree with Gardener, think it would be more useful to cover the area to try to impede the weeds, so you will have a better start next year. Don't think green manure would do that and the more pernicious weeds could just suffocate it. Lots of old carpets in Skips round our way Tim.
We planted some green manure in September, a field bean. It grew fine, but over the winter some little creature has been digging it out and nibbling on it, leaving a little round hole in the soil. we have been puzzled as to what sort of creatures it was - a bird, a little mouse? ??? Went over last week in the snow to see if we could see any little footprints, but nothing discernable. :) busy_lizzie