An Ichneumon having a brief rest on a leaf.
No interactions present.
I'm tempted to say it's Rhyssella approximator, based on transverse striations across the mesoscutum (top of the thorax) but perhaps I'm imaging that. It's difficult to be sure from the photo. Otherwise it could be one of numerous species of Pimplinae or Poemeniinae.
Lat/Lng: 51.36816, 0.00736
OS grid ref: TQ398651