A small yellowish leafhopper associated with various tree species, including Prunus.  Identification of Edwardsiana species is very difficult; to identify this species, dissection of the male and examination of internal male genitalia is needed.  

Noting the host plant for the Edwardsiana can support identification. 

other Edwardsiana

male

Photograph of insect and of dissected male genitalia.  If possible, you should note the host plant

Sloe, cultivated plum, currant, Viburnum lantana, sallow (Le Quesne, 1981) 

Common (see UK Auchenorrhyncha checklist 2021 on British Bugs website

Rarely recorded, but almost certainly overlooked due to identification difficulty