Development Early influences on writer
Alex Garland included the
George A. Romero films
Night of the Living Dead (1968) and
Dawn of the Dead (1978), which he loved as a child. Garland claimed to have largely forgotten about the zombie genre until he played the video game
Resident Evil (1996), which reminded him how much he loved zombies after "having not really encountered zombies for quite a while". Director
Danny Boyle liked Garland's screenplay for a proposed zombie film, having directed
the 2000 film adaptation of Garland's 1996 novel
The Beach. On the DVD
audio commentary, Garland said the idea of Britain being under quarantine was developed during production, replacing an earlier conception of the outbreak as a worldwide contagion that included a discarded idea of infection boarding a plane to the United States; he linked the quarantine framing to contemporary UK anxieties about
BSE (mad cow disease) and
foot-and-mouth disease. Garland described the supermarket sequence as a deliberate nod to Romero's
Dawn of the Dead, and the chained Infected as a nod to the character "Bub" in
Day of the Dead. Garland said he was thinking of the plantation dinner sequence from
Apocalypse Now Redux when writing the soldiers' dinner scene. Producer
Andrew Macdonald had access to funding from the
National Lottery and
pitched it to
Universal Pictures, who declined to support it. Budget constraints proved to be an issue, with
Christopher Eccleston having to take an emergency pay cut. Boyle identified
John Wyndham's 1951 novel
The Day of the Triffids as Garland's original inspiration for the story. Five months after the film was released in Europe, video game publisher
NovaLogic hosted a
graffiti competition in a cross-promotion with the game
Devastation (2003). The connection was owed mainly to the similar theme of a devastated world. The prizes consisted of signed screenplay copies and posters along with DVDs. For the Infected, Boyle took inspiration from real-life diseases, particularly
Ebola, with aspects of
rabies.
Casting On the DVD commentary, Boyle explains that with the aim of preserving the
suspension of disbelief, relatively unknown actors were cast in the film. Cillian Murphy had starred primarily in small independent films, while Naomie Harris had acted on British television as a child, and Megan Burns had only one previous film credit. However, Christopher Eccleston and
Brendan Gleeson were well-known
character actors. Murphy originally auditioned for the role with a
Standard Southern British accent, as Jim was written to be English. However, during filming, Boyle and Murphy decided to revert to the actor's natural accent, and rewrote the character as Irish.
Filming , including
Westminster Bridge, had to be filmed early in the morning or while the crew briefly closed streets for the film's opening sequence. The film features scenes set in normally bustling parts of London, such as
Westminster Bridge,
Piccadilly Circus,
Horse Guards Parade and
Oxford Street. To depict these locations as desolate, the film crew closed off sections of street for minutes at a time, usually on Sunday mornings. They typically had around 45 minutes after dawn to shoot the locations devoid of members of the public and traffic, with closures lasting only "90 seconds or two minutes" at a time while traffic was held back by volunteer marshals (students and friends). The majority of the film (except for the final sequence when the military plane finds Jim, Selena, and Hannah, which was shot on
35mm film) was shot on
Canon XL1 digital video (DV) cameras, The scenes of the empty
M1 motorway were also filmed within limited periods; Boyle said police created a "rolling block" in both directions to produce a temporary corridor of empty road, giving the crew seven or eight minutes to shoot using multiple cameras. For the London scene in which Jim walks by an overturned
double-decker bus, the film crew placed the bus on its side and removed it when the shot was finished, all within about 15–20 minutes. The crew had asked
Westminster City Council for permission to place the bus outside
Downing Street, which was denied; when they arrived there at 4am and nobody from the council was present, they placed the bus there anyway. The mansion used in the film was
Trafalgar Park near
Salisbury. The old ruins used as the setting for an idyllic interlude in their journey to Manchester were those of
Waverley Abbey, Surrey. The end scenes of the film with Jim, Selena and Hannah living in a rural cottage were filmed around
Ennerdale in Cumbria. The production team hired an
optometrist to supervise with the red
contact lenses needed for cast members playing the infected. Boyle said some pick-ups were shot by cinematographer Alwin Küchler because Anthony Dod Mantle was unavailable. Boyle said the film initially ended with Jim being shot, which marked the end of the first budget; after showing the cut to Fox, the production received additional funding and shot the final sequence months later. After several different pitches for a new ending, with the original ending which featured Jim's death having
tested badly with audiences, the studio approved the ending eventually used. The crew arranged for a real jet to fly overhead for them to film, as this was cheaper than approximately £70,000 for a
computer-generated one. Boyle said the overflight was filmed with an RAF jet standing in for the Finnish Air Force, and that the markings could not be changed.
Alternative endings The DVD extras include three alternative endings, all of which conclude with Jim dying. The first alternate ending involves Jim dying of his gunshot wounds in a hospital despite Selena and Hannah's efforts to save him, concluding with the two of them leaving the hospital to an unknown fate. The US cinematic release included this ending after the film's credits in response to intense online debates over whether or not it was a more appropriate conclusion than the official ending. In the second, Jim dreams of the accident that left him in a coma as he dies from his gunshot wounds. The third, a more radical departure, was presented only in
storyboards; instead of Frank being killed by soldiers after being infected, the other survivors tie him up and discover a research laboratory at the blockade, where Jim undergoes a full
blood transfusion in order to save Frank, at the cost of his own life. This ending was never filmed due to Boyle and Garland agreeing that it lacked plausability. == Music ==