No interactions present.
The problem with the 3 species is that they are a bit too variable to determine on superficial characters alone. Dissection is the only way to be sure. There might be differences in preferred habitat in that they have different food plants, but that is a risky basis on which to identify the species.
Thank you all for your comments
Lat/Lng: 52.1, -3.4
OS grid ref: SO0451