A little interview from when they were in London shooting S4 "Yanks in the UK" premiere for Bones. You can say it has spoilers so If you don't want to know nothing about it don't see it. She also talks a little about her year in London when she was a child.
And here the b-roll/behind the scenes of London shootings. Again, it contains spoilers so avoid it if you don't want to know absolutely anything about it.