Bombus hortorum or Bombus jonellus

Again on my garden fence this morning were several bumblebees enjoying the morning sunshine.
This particular bumblebee caught my eye as it seemed to display two yellow bands on its thorax as opposed to the one band on the species Bombus terrestris and Bombus lucorum.This would indicate therefore that the bumblebee is the Garden Bombus hortorum or the Heath Bombus jonellus as both have the two bands.

A definite identification is normally seen in the shape of the face,more or less rounded in the case of the jonellus whereas hortorum is elongated.