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The Tree Bumblebee has a ginger thorax, a black abdomen and a white tail. It is very distinctive and the only UK Bumblebee with this coloration. So in answer to your question, no this is not a Tree Bumblebee it is a Common Carder Bee.
Chris Brooks - www.dragonfly-images.co.uk
My Flickr site - www.flickr.com/photos/ceb1298
Lat/Lng: 55.976, -2.5707
OS grid ref: NT644760