Large yellowish aphid with two very distinct dark bars on its abdomen.
No interactions present.
it's certainly not a Drepanosiphum. It doesn't seem to have any cornicles, not long ones anyway and has lots of small tubercles on its back. The quality of the photo doesn't make ID possible though - something like Therioaphis maybe?
Lat/Lng: 50.3691, -4.1421
OS grid ref: SX477543
The area consist of old wooden seats surrounded by raised beds of trees and shrubs. There was a large number of ladybirds and there larvae on the plants and seats at the time that this photo was taken.