As you have probably a wealth of bulrushes. use them. you will need a lot to feed four people, and in their natural state that aren't very suitable for a polite dinner. however pretty nice biscuits can be made from them, I didnt do this last week as I couldnt be bothered.
1 wash them thoroughly, remove blcak bits.
2 bake them on high for ten minutes
3 split and peel
4 batter with rolling pin and water to extract as much starch as you can
5 remove the string and dry the "sludge" until you have paste
6 add local honey bake until you have biscuits
This would be a lot of work
Dont bother with parnsips in the norfork broads unless you what every water dropwort that grows locally [you have some rare oenanthe growing in norfolk wetlands] looks like. I'll post you wild parnsips if you wish, it is not an easy one to spot or get right without experiance. I cant get to the post office until monday morning though.
wild turnip should be about in hedges in your area. sometimes the best foragable plants are in the neglected bit of your garden. dont forget nettles and bittercress.
