SKIPPERS

Small, orange butterflies busily flying among long grasses could be the Small Skipper or the Essex Skipper (first recognised as a separate species in Essex in 1889).

The main difference is the colour at the tip of the antennae  - orange or brown for the Small Skipper and black for the Essex Skipper.  In the photos below I would guess the tip is black but I'm not quite sure.

When perched and especially when feeding, Skippers separate their forewings and hind wings.

This is another butterfly whose caterpillars rely on some grass being left long through the winter.