uncertain about white tailed bumblebees

[threadspider]

Could someone look at these images and let me know if this is Bombus vestalis or something else? The first 2 images are the same individual, the 3rd is another. I thought I had these sorted out in my mind but the 20 odd different bumbles on the same lavender bush yesterday has thrown any confidence I had at identifying simple bumbles out of the window!
Judith

[eucera]

In Wiltshire these are almost certainly B. vestalis. I have dozens on my garden Lavender at the moment