Members of Sutton Green Party joined other local environmental groups at the world record breaking premiere of The Age of Stupid.
The group, along with over 15,000 other people around the country, tuned in to break the record for people watching a film premiere at the same time.
On March 15 the "peoples premiere" of the environmental docu-drama was held in 65 venues across Britain.
The potential audience capacity for the film was 16,000 nationwide, achieving the world record feat via satellite link up.
Local Green Party members attended the premiere at the Vue in Purley way in Croydon.
In Leicester Square, the audience watched intently inside a solar powered cinema tent.
Commenting on the film and world record achievement, Sutton Green Party spokesperson George Dow said: “This film conveyed the stark reality of what life will be like in 2055 if we don’t act to stop climate change now.
"It is a docu-drama hybrid featuring Oscar-nominated Pete Postlethwaite as an old man living in the devastated world of 2055, watching actual archive footage from 2008 and asking: why didn’t we stop climate change when we had the chance?
“Governments around the world have a duty to deliver at the next UN Climate Change Conference in December 2009 and the makers of this film made this point at the People’s Première.
"The film, which took four years to make, contains actual news footage and animation sequences to get the climate change message across in an easy to understand manner. I urge everyone to see it.”