Flower Friday - B

Flower Friday with a twist of B.
So this is a British Wildflower. That's the B.
It was growing round by the pond where I walked the dogs this morning.
If anyone can tell me what sort of wildflower it is I'd B grateful!
There were quite a few Butterflies around it too.

Thanks to Bikerbear - hope you get some better "twists" than this!!