The buff tailed bumble bee?

Well I think it may be. I got my be identification chart out and after much thought decided it may be the buff tail variety. Let me know if I am wrong!

I do love to see the bees about and they are very busy currently humming their way through the Marjoram flowers which as just outside the back door. When I sit at coffee time I can admire them and try my best to decide which variety of the many they are!