I consider myself very lucky finding this bumble bee nest in my garden shed. They aren't very common and can be difficult to find.
I put them back where I have found them. Hopefully, the bumblebees won't be much alarmed by my photo session.
Namely, they were in the ball of fleece I needed to cover the plants against the frost. So, I had to disturb them. I wrapped them back into a piece of fleece and stored them in a plastic container.
So far, so good.