Length 5-7 mm. A yellow-green leafhopper associated with sallows. There may be some reddish-brown shading across the clavus and inner parts of forewings, some darker marks on pronotum. The face and vertex are also yellow-green, and nmarked. 

Other Idiocerinae on sallows

Close examination of a specimen is needed.  Provide photographs taken from top, side and face; and note the host plant. 

on sallows

June to early October.

Common (ref.: UK Auchenorrhyncha checklist 2021)

Few records, but probably under-recorded due to ID difficulty

https://www.britishbugs.org.uk/homoptera/Cicadellidae/Idiocerus_confusus.html