I assume it is some sort of fly? Long antenae, striped body and prominant yellow spot on back of head
No interactions present.
I agree with the ichneumon identification, this is a hymenopteran. A fly Diptera would never have long thread-like antennae like this. The yellow spot is on the thorax. I dont think its the species in the photo mentioned by Foxy as the abdominal patterns appear different. But I dont have any alternative suggestions
For more on the complexities of identifying ichneumons see:
Entomologist and biological recorder
This is likely to be a female Amblyteles armatorius which has a series of narrow yellow apical bands on the gastral tergites e.g. http://www.ispot.org.uk/node/86404.
This is different from the ?Ichneumon stramentorius linked above which has the two postpetiolar tergites almost entirely yellow and the tergites behind that almost entrely black
Lat/Lng: 51.620052, -1.07536
OS grid ref: SU641916