Hi Pat

I went searching after I read your post and found this link...
http://www.eatwell.gov.uk/healthydie...dgerowharvest/
It may be of some use and I've bookmarked it so I can have a try too. I've used the obvious berries, but I've never been brave enough to test the fungi. I think you really need to KNOW what you are doing before you try the fungi species!!
I think you can eat nasturtiums (sp?) and jack by the hedge is supposed to have a garlicky taste isn't it?
Anyway here is another site which lists 150+ edible UK wild plants..
http://www.countrylovers.co.uk/wildfoodjj/rwfgplts.htm
Enjoy and happy eating!!