British Bumblebee id

This summer I started trying to get to grips with bumblebee id and found it a bit of a minefield until I got my eye in and got used to what to look for. The following plates are some I found online and the diagramatic style helped me quite a bit. They seemed much better for id compared to photographs which at a first glance (and often 2nd glance) all looked the same!
There aren't too many bumblebees still about but hopefully this will prove useful next spring when these little beauties are back on the wing.