A light green caterpillar with white/silver stripes.
No interactions present.
Sorry, should have added the second photograph before.
Definitely a hoverfly larva, and the markings are a good match for Scaeva pyrastri (although I believe Scaeva selenitica is similar).
Entomologist and biological recorder
Thanks for the identification. Intersting to see this wriggling around on the leaf.
Lat/Lng: 50.72037, -1.8464
OS grid ref: SZ109912