1. London Councilshttp%3A%2F%2Fwww.londoncouncils.gov.uk
2. The Mayor's Air Quality Atrategyhttp%3A%2F%2Fwww.london.gov.uk%2Fmayor%2Fstrategies%2Fair_quality%2F
3. Traffic Management and Air Quality Research Programme Final Summary;Report to Department of Transport of UK.,2006
4. The Air Quality Standards Regulations 2007 No. 64. 2007http%3A%2F%2Fwww.legislation.gov.uk%2Fsi%2Fsi2007%2Fuksi_20070064_en_1