I used google steet view to look at places like Abbey Road and Abbey Road Studios and 3 Saville Row. I looked at the graffitti wall at abbey road and zoomed in on it. The clearest one i saw said Bob Dylan Was Here. And for saville Row 3 i moved the view to look up so it was like you were one of those people on the ground looking at the beatles playing on the roof. Its pretty cool though.