White-tailed Bumble Bee 1

 

The White-tailed bumble bee with a black back and yellow stripes (Bombus lucorum), one of our commonest bumble bees. Above with full pollen sacks on hypericum (St John's wort) and on hogweed.
The Heath bumble bee and the Broken-belted bumble bee also have white tails. Buff-tailed bumble bee workers have dirty white tails and are similar to the white-tailed bee.
 
       
   

White-tailed bumble bee 2

Apparent white-tailed bumble bee 3,

with an orange back, is a hoverfly