White-tailed Bumblebee (Bombus (Bombus) lucorum)

White-tailed Bumblebee (Bombus (Bombus) lucorum)

Observation - White-tailed Bumblebee (Bombus (Bombus) lucorum) . Description: A small bee with grey hairs. Very active (hence the rather poor photos), feeding on Devil's Bit Scabious. Can anyone tell me what species it is, please? The nearest I can get by looking at the pictures on the BWARS site is Bombus sylvarum but this seems

A small bee with grey hairs. Very active (hence the rather poor photos), feeding on Devil's Bit Scabious. Can anyone tell me what species it is, please? The nearest I can get by looking at the pictures on the BWARS site is Bombus sylvarum but this seems so unlikely that I'm not even going to suggest that "it might be this".
Edit: Changed to match Matt's ID. Many thanks.