DSC, I can confirm to you that Caligula had its first showing on British TV very late at night on Hallowe'en 1999 or to be very precise at
11.50pm Sunday 31st October 1999 on Channel 4. Here is a trail for it too. It was part of some Film Four on C4 evening with another film before it. Unsurprising it was so late.
Trailer should automatically start at 7m 52s into this -
youtu.be/dsCc9ZdUbyg?si=wARH972cwpcwtSKq&t=472
John Gielgud obviously liked appearing in films with a very high penis count, without getting his own out. I've also got one of his called Prospero's Books from 1991, a Peter Greenaway film, and he was always keen to show men in all their natural glory in his movies! I remember seeing that one late at night on Channel 4 also, in about early 1994 and thinking whoa that's a lot of c**k.
Thinking about Caligula though, should that new release of the film not really be entitled, Caligula - The Ultimate
Uncut.