The second photo is terrible, but I've included it because it shows how bright the abdomen was.
No interactions present.
The common one in W Ross is Chrysis rutiliventris, parasitic on the solitary Ancistrocerus wasps, but there are other possibilities. Definitely Chrysis, though.
recording wildlife with The Recorder's Year on www.hbrg.org.uk/TRY.html.
Lat/Lng: 58.0582, -5.4245
OS grid ref: NB980128