Best imagined by George A Romero in his 'Trilogy of the Dead' series. (Of four films.)
Second in the series was Dawn of the Dead - one of the great B-movies of all time, and inspiration for Shaun Of The Dead - a film written by Simon Pegg and Edgar Wright as an extension of an opening scene to Spaced that was in turn inspired by the Resident Evil console game.
Shaun of the Dead tells the story of what was happening in London at the time of the events depicted in Dawn of the Dead.
Aaaaaaaaaaanyway - the relevance is that Joinees Knight, Lincoln and Heulwyn were all extras in the film, and appeared as Zombies.