Buying Nori in the UK???

[MarkW19]

I'm looking for some Nori seaweed sheets in the UK, and also some vitamins to soak it in (I guess you can get them from the same place).

But, I've not had any luck as yet at my supermarket etc.

Can anyone in the UK recommend somewhere mail order/online to buy these things?

So many things to buy! Good job I'm a spend-a-holic...