On the BFI website is a film of the 1962 carnival in Bognor Regis which includes Tony Hancock.
The BFI website describes the film as follows: Organised by the Lions Club the 1962 Carnival in Bognor Regis attracted many famous faces, including Tony Hancock, who crowns the Carnival Queen, John Le Mesurier, Mario Fabrizi, future Dr Who, Jon Pertwee, Ferdy Mayne and many more. But the real star is the town itself which puts on a festive face for the duration of the Carnival season - with crazy competitions and wacky races, a helicopter rescue, a parade of floats, pipe bands, Morris dancers and a funfair with firework.
The first 3-4 minutes of the film, which is obviously a Super 8 amateur recording from the time, record a dinner dance in which the Carnival Queen is crowned by Tony. It’s during this section that you can see Tony, John and Mario. For those that are interested, at about 17 minutes in, there is the brief footage of Jon Pertwee.
The film can be found here.