No interactions present.
My field guide (Waring & Townsend) doesn't mention this species. Didn't make a note of the plant, but it was an umbellifer - possibly Valerian.
Isle of Skye
Parsnip Moth is in the new Field Guide to the Micro Moths of GB and I.
Lat/Lng: 57.413, -6.2
OS grid ref: NG478436