> Some of us still do! It's tricky to find it fresh, you usually only get it in small greengrocers or at the Auld Lammas fair. Used to be quite cheap for a bag. Very salty but quite edible and said to be nutrient-dense.
I had some potatoes from the Island of Jersey when I was working in kitchens in London, they were incredibly good and paired well with seafood dishes: I had to do some research on a dish my Sous had asked me to create with them and I found out why they were so well matched.
Turns out the Isle of Jersey is often covered in seaweed [0], and they use it extensively in the cultivation of it's potatoes. So even indirectly they are eaten even though things like wakame and kombu are not common outside of fine-dining in London they are still a main-stay of the British diet, well if you Jersey Royals at least.