What is this please?

RussJ

Found a pretty new arrival in a bit of scrub land in our garden.

Borderline

I think that might be Anemone Blanda.

RussJ

Thank you.

Greenmum

Also known as wind flower. The name wind flower is because the seed is spread by the wind and they multiply themselves easily this way.  You can find drifts of them along a path edge down a road for example following the line of the prevailing wind.