The 2012 Olympics will leave London with a sustainable legacy, claim researchers.

The first official impact report into preparations for the Summer Olympic and Paralympic Games found that London will benefit from a better rail transport infrastructure and the improved treatment of hazardous wastes that are part of the Olympic developments.

Research also suggested that the construction of Olympic venues has had no negative impact on London’s air quality.

56 key indicators including carbon emission, housing, employment and public transport were analysed by a group from the University of East London (UEL) for the report to the International Olympics Committee.

Research leader Professor Alan Brimicombe from UEL said: “Clearly this is an important document for the 2012 Games, UEL, and East London as a whole. We have undertaken thorough analysis of a large number factors ranging from crime and poverty to physical activity and education, with a view to assessing how preparations for the games may have impacted upon these.

“Based on the research carried out and evidence gathered, we are confident in reporting that preparations for London 2012 have already had a positive impact in a number of areas.”

Leaving a sustainable legacy was a key component of London’s successful bid for the Games in 2005.