A small planthopper associated with grasslands, usually brachypterous.  The males have a dark abdomen and light forewings, and a distinctive large genital segment which is deeply cut into a blunt 'V' shape on the upper surface.  Females are paler and harder to identify. 

males females

Good photographs of males, showing abdomen.  Females can be identifed with care from a specimen, and with expert verification.

Grasslands

Common (ref.: UK Auchenorrhyncha checklist 2021)

Occasionally recorded

https://www.britishbugs.org.uk/homoptera/Delphacidae/Dicrranotropis_hamata.html