'Daisy, Daisy, give me your answer do ...'

Despite the pitiless weather, spring is moving forward. Besides the frog spawn seen at the Banstead Woods pond, there are now around nine clumps of the stuff at the Lagoon. And the daisies pictured below were providing food for various insects (including lots of large bumblebees) in the wildflower meadow beside the Lagoon. Although these plants are of similar size and growing in the same patch, the flowers and leaves are different, with one having a red spot in the middle of the flower. Anyone know which these are?
GK

Fly included for scale.

Frog spawn at the Lagoon March 2020