Small green and brown winged insect.
No interactions present.
It does look like a leaf hopper have had a look but not sure which one as my book's only have a few examples in them.
Thanks - it does look like one of these, which is interesting as there are no maples nearby unless there is something hidden in a garden. Or poplars, though I know of a couple of willows a few hundred yards away.
Lat/Lng: 51.3, 0.0
OS grid ref: TQ3966