London, so of course it was a coincidence, and not a cute reference by the filmmakers. When Gandhi (played by Ben Kingsley) travels to London, he stays at Kingsley Hall.
300,000 extras appeared in the funeral sequence. About 200,000 were volunteers and 94,560 were paid a small fee (under contract). The sequence was filmed on 31st Jan 1981, the 33rd anniversary of Gandhi's funeral. 11 crews shot over 20,000 feet of film, which was pared down to 125 seconds in the final release.
Richard Attenborough and his wife Sheila Sim owned a share of the rights in Britain's longest-running play "The Mousetrap" which they sold to fund the production of this movie.
Dustin Hoffman was interested in playing Gandhi, but was offered Tootsie (1982).
For the funeral scene, advertisements calling for 400,000 extras were either distributed in pamphlets and by newspapers in Delhi. Extras were not allowed to wear anything other than white and as part of security measures, turnstiles were built at selected entry points for crowd control. The crew bought any clothing that was not white.
No studio was interested in financing the film. Richard Attenborough cited that most of the financing were solicited from: 1. Joseph E. Levine whom agreed to finance in exchange of Attenborough directing A Bridge Too Far (1977) and Magic (1978). 2. The sale of the ownership share of "The Mousetrap". 3. Jake Eberts, a friend of Attenborough. The remaining of the money were solicited from major companies in England minus the BBC.
Dustin Hoffman had expressed an early desire to play the title role in Gandhi (1982), but was offered Tootsie (1982) the same year and ended up taking the latter role. He eventually lost the Oscar that year to Ben Kingsley who played Gandhi.