Small wasp like insect on Arnica flower. Scale-wise, the whole flower is ~9cm across and the centre ~2cm.
No interactions present.
perhaps a Nomada parasitic bee? It looks rather like the one I saw in my garden yesterday, but I am very much an insect beginner. Might be worth searching to see if this might be anything like it.
I think it could be a Nomad Bee (Nomada.
Have a look at the excellent http://www.bwars.com
where several species are shown. But getting down to species can be difficult, I think.
Thanks Chalkie and Amadan; yes I agree having looked at the bwars site, and yes very tricky to be more exact!
Lat/Lng: 51.9, -2.9
OS grid ref: SO4330