Surely it is Oxeye Daisy?
Most of the meadows we planted in 2021 are now full of Oxeye Daisy. Aside from a few flowers, it hid itself last year. This is because a transplanted wildflower that has any sense, first gets the best root-hold it can to compete with competitors like grass. Before throwing up energy-expensive flowers. In year 2, they appear in whole rosettes of a few plants. They are, unarguably delightful.
And they keep going until October!
WHAT ELSE IS FLOWERING IN OUR MEADOWS IN THE EAST MIDLANDS?
Lawn Daisy
Red Campion
Ragged Robin
Common Poppy
We would normally see some other varieties like Bird's Foot Trefoil flowering by now, but it has been extremely dry, and many wildflowers have a built in mechanism that restricts growth in drought-like conditions. Plus they cannot physically grow if they have insufficient water, so it depends on the drought tolerance of the variety.