The forewings are brightly marked in red and green, with green head and pronotum, yellow cuneus with red markings and red veins on wing membrane.  Length about 4mm; A2 c. equal in length to base of pronotum.

Dichrooscytus rufipennis

Submit photograph, state measurement and note the host plant from which it was collected

Juniper, including cultivated forms, and other conifers such as Nootka Cypress (pers. comm. J. Flanagan).  The Leicester specimen was collected from a Wellingtonia.

NS (Nb) - scarce, notable (ref British Heteroptera checklist (2021)

Rare

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