A small pale greenish bug found on Salix spp., especially osier and white willow.  The 1st antennal segment is very short and marked with black in males and females, and the 2nd segment is black in males.  The black spines on the hind tibiae arise from black spots.

Campylomma verbasci is very similar but found on Mulleins and related species. 

Photographs showing antennae and tibiae; note species of plant on which it was found

Salix - willows and osiers

Local in Southern and Central England; Widely scattered (ref.: UK checklist 2021 on British Bugs website)

The 2024 record is believed to be the first recorded in VC55

https://www.britishbugs.org.uk/heteroptera/Miridae/campylomma_annulicorne.html