Check out http://bumblebeeconservation.org/about-bees/identification/ or www.nhm.ac.uk.
http://www.bbowt.org.uk/wildlife/wildlife-advice/bees/different-kinds-bees includes solitary bees - the tawny mining bee might be worth looking at.

Honey bees aren't orange and they are more wasp shaped than bumbles. There are lots or orange bumbles.

If you can get a photo of the bee you saw, send it to the link given above by Urbanite. It will be id'd for you. It will be helpful for them to be able to track which bees are where too.

as a bee keeper its brown i know i got stung on monday.