It looks like Anemone nemorosa, but I would have thought a bit early.

Not flowering now B - it's from a picture I came across and rather liked them. The plants behind are Primula Japonica and are flowering in the picture, which I cropped.
I thought they looked like A nemorosa but couldn't find an image of one with 4 petals!

I've had a long search. The occasional A. nemorosa has six petals, but those are different again. They don't sit like nemorosa either, do they? Too upright. We're struggling!

Annoying when you recognise a plant but cannot fetch the name for it from memory.

Worthy.... The leaf thing below the flowers was pointing me towards Anemone but as you say the flowers are a bit different.
Owdboggy.... Maybe it will come to you at some point :)

Appologies, I did not mean to say A. nemorosa but A. trullifolia. These woodland anemones can have just four petals, though five or even six is more normal.

Check out Anemone obtusiloba.

Thanks boys :) It could be either or and no good for where I'd like to plant it :( Back to the drawing board!

There is very little, if any, difference between the two, Scottish. Botanists are suggesting that they are, in fact, the same plant but with slight leaf variation.
It would be worth your while to try and find somewhere suitable, though. If you can get one with a good, deep blue flower it is a little stunner.

It is nice. Isn't it :)) It's on my list B. Checked a couple of local places today with no luck. I may have to source online.