I had to chuckle when the British Bugs website described this little bug, which is no more than 6mm long, as ‘large’ but, compared to others in the Cicadellidae family – i.e. the leafhoppers – it’s a giant. The website also says it’s a common species but this was the first I’d seen so I obviously haven’t been looking closely enough.
This is Evacanthus interruptus (a female, I believe, as her wings are shorter than the length of her abdomen). They favour tall herbaceous vegetation in meadows, scrubby areas and woodlands, and can be seen between June and October. I’ll be on the look out for more.