Insect life on Knapweed, Portland, Dorset

After shopping we had a late lunch of salad at the Bill and went for a walk noticing so many insects on the plants particularly knapweed.

They are from top left- Six spot Burnet Moth, a white looking bumble bee - any ideas?- red tailed bumble bee and the marbled white butterfly which thrives during hot summers.


Edit: have identified the  top right ad a shrill carder bee which are quite rare.