Hornets are large insects which catch others - here is one which caught a bumblebee, and flew along with it before hanging by one leg from a branch to feed.
Note the different sized abdomen's - male and female perhaps?
Bombylius major, known as a bee fly, feeding on flowers.
Around 3mm long, seen in the garden. Perhaps an aphid nymph.
Around 4-5mm long, again in the garden.
Banded demoiselle - Calopteryx splendens