A new guest in the shape of a very nice and skittish bee, Nomada spec.
Unfortunately the bee did not let me get close what resulted in one usable photo that needed serious cropping with mediocre results, but okay.
It is a male and I suspect the species Nomada flava, but it could also be Nomada signata and maybe even Nomada panzeri although the latter seems most improbable to me.
The distinguishing characteristic between N. flava and N. signata, the hairs on the middle thigh , is unfortunately not visible in the photo.
References1 wildebijen.nl, "De Nederlandse bijen en hun relaties, overzicht van in Nederland en Vlaanderen voorkomende solitaire en sociale bijen (Apidea s.l.)"