What a whacky weird life Collins led, huh? Opium addiction, ongoing long-term relationships with two women, big buddies with Dickens.
[Edit] More with the research! YouTube, home of pirated video, has a crappy selection of G&S. Practically the only decent clip is this song from Patience, featuring the excellent Bunthorne of Dennis Olsen. (NB: Giles and Watson go to see the Mikado in its final month at the Savoy. Which is the bit I'm writing now. Perhaps for (cough) research I will go re-watch Topsy-Turvy)