Daisy
Meadow buttercup
Pollenating
Dasytes plumbeus
I (hopefully) identified this correctly. Dasytes plumbeus is a very common beetle on flowers, where it feeds on pollen. It is about 3 to 5 mm long.
_DSF7143
Calliphora vicina
I (hopefully) identified this correctly. Calliphora vicina is a member of the family Calliphoridae, which includes blow flies and bottle flies.
Marmalade hoverfly
Episyrphus balteatus, sometimes called the marmalade hoverfly.
Carpenter ant