Female with pollen on hind legs. It looks like there is a mite on its back.
It looks very similar to the Red-shanked Bumble Bee (Bombus ruderarius)
https://inaturalist.lu/observations/173950406
https://www.facebook.com/groups/europeanichneumonoidea/permalink/1246801939464476/
Next to nest of Gymnomerus laevipes, and Osmia leucomelana. Stelis and Trypoxylon are also here in the garden.