We watched "Tthe Witches" starrng Angelica Houston earlier this evening.
In one scene when the witches were assembled in the conference hall just before the boy is turned into a rat, I could swear that Michael Palin is sitting amongst the witches dressed in a dress and wig.
I can't find any reference to this in the IMDB website either under his name or the name of the film.
Please tell me I wasn't dreaming! Maybe Rowan Atkinson had something to do with it.