Last week I went on a lovely camping holiday to North Norfolk. Whilst exploring the beautiful countryside, seashore and salt marshes I found lots of interesting edible wild plants. The marshes in particular are a fascinating and unique environment. Here are a few photos...
Wild Celery

I didn't eat any, but I did crush the leaf and give it a good sniff to be sure. Unmistakeable!
(
This, by the way, isn't celery!)
Fool's Watercress / Pie-cress?

This one I'm less certain of. I don't think it's true watercress, and I can't find anything else that it looks like. Aparently, if my ID is correct, it's also edible (even though the name seems to suggest otherwise!).
[edit] Miles Irving lists this as edible, but according to Ray Mears and Gordon Hillman it's poisonous! I don't think I'll be trying it...
Sea Purslane

The marshes were covered in this! I'd seen it before but never tried it. The leaves are juicy and salty. It's a member of the Goosefoot family (the same as Fat Hen, which I often collect from my allotment to use as Spinach).
Marsh Samphire

Again, I'd seen this before but not tried it. This time I collected a small basketful and cooked it by briefly boiling in (unsalted) water. Apart from the fact that it has "bones" (must be a nightmare to eat with fish!) it's very good indeed. Succulent and not too salty after cooking. The tips are nice and crunchy to nibble raw as well. I noticed it was being sold in local shops - apparently it's a delicacy.
Apart from these I also spotted Bladder Campion, Sea Beet, Sea Holly, Sea Lettuce, Alexanders and various unidentified Apiaceae, including what I think was a mass of angelica (the garden type, not the common wild angelica). There were also some amazing gigantic silvery thistles which looked a little like Artichokes - they may or may not have been edible but I wish I'd taken a photograph!