3mm long. Elongate pointed forewing with dark spots at the apices of four cells. The forewing cells are yellowish, especially near the veins, which themselves are yellow and/or green. Dark tip to the orange antennae. 

Photographs showing key features required. Please state host plant.

Found on Box (Buxus sempervirens). 

All year round.

Previously uncommon and restricted to southern England, it is now much more widespread. 

Common on the host plant (Box).

https://www.britishbugs.org.uk/homoptera/Psylloidea/Spanioneura_fonscolombii.html