It is not possible to move that nest, they will die but did you know that bumblebees are under threat (even yours from you 🙂 . They do struggle to find natural habits these days and are very non aggressive. If you can live with them until the Autumn the bees will naturally leave anyway and not use that nest again. If you are reasonably careful you will be able to walk around them real close up, without them bothering you at all.
That is why we make every effort to extend the lives of our native bees by placing them in remote locations to ‘do their work’.