I happen to know from discussing it with her that scilla had done a lot of research before the programme! And there is a lot about Montague R Leverson online in the archives of the NY Times - he was a busy man! No-one seems to know though why he left England, and what the accusations were. It seems like they may have been something to do with the Trade union troubles that were going on at the time. If anyone has any clues it would be great!