Ichneumon suspiciosus?

Ichneumon suspiciosus?

Observation - Ichneumon suspiciosus? - UK and Ireland. Description: I think this is Ichneumon suspiciosus, but I'm not certain as the book I was using described them as being between 15-18mm, but this specimen was twice that length at around 27mm.

I think this is Ichneumon suspiciosus, but I'm not certain as the book I was using described them as being between 15-18mm, but this specimen was twice that length at around 27mm.