They unfurled two banners reading "Global warming, the final warning" and "Stop aviation growth" and stayed on the roof for a couple of hours before descending and being arrested for suspected criminal damage and contravening airport by-laws.
The activists achieved considerable local media coverage but on the other side of the world the politicians weren't listening. Due to a staggering amount of pressure from the petrochemical industries, all that could be agreed was a very leaky protocol with just a 5.2% reduction in greenhouse gases from 1990 levels by 2012. This is far below the EU's 15% proposal and nowhere near the 60% reduction scientists say is necessary to stop dangerous climate change.
Info on global climatic change: Manchester Friends of the Earth (Tel: 0161 834 8221; email: firstname.lastname@example.org)