When I was but a lad I witnessed a Beeb televised production of "Ruddigore" which I think was stop-action animated. Only saw it the once but became a devotee of that Operetta and the G & S canon. It made a BIG difference in my life and education because it was SO clever and nevertheless SO Victorian and the popular wisdom of the time was that we were so lucky to be modern and out of that era.
In college I was in a production of "Pirates" in which I was a chorister pirate in the first Act (and got to grab a laydee) and a policeman in the second Act (and got to rescue a laydee, at least temporarily). And a la Goons I got to say 'rhubarb! rhubarb!' a coupla times, too.

Re: The first posting- I never knew what a coster was, or why he'd be jumping on his mother, and I believe the proper wording, if not the staged version as opposed to the printed lyric, is the Sergeant makes a poor pun of it and sings:

Sergeant- When the coster's finished jumping on his mother-
Police- On his mother.
Sergeant- He loves to lie a-basking in the sun-
Police- In the sun.
Sergeant- Ah, take one consideration with another-
Police-With another.
Sergeant- A policeman's lot is not a nappy one.
Police- OHHHH!

I think G & S have a long run ahead of them because the humor was sly and self deprecating and the music so engaging.

I recall hearing about thirty years ago that during the Occupation, Americans staged a production of Mikado in Japan and there were some PC questions asked about how appropriate that would be. They went ahead with it and the Japanese loved it.

I'm also aware that Frederick gained his majority in 1940 and I'm sure that someone in Wartime Britain would have celebrated the fact but I've never found out what in fact happened.