"Air Quality in London – briefing note to GLA Environment and Heath Committee" (sic. As in Hampstead Heath?)

Link to PDF file

"This note provides results from air quality monitoring carried out in London during 2011 and looks at changes in nitrogen dioxide and PM10 [particulate] concentrations since 1998.

"Provisional results for 2011 indicate that the annual mean National Air Quality Strategy (NAQS) Objective (which mirrors the EU Limit Values) for NO2 was breached at the majority of locations close to roads and at five locations away from busy roads.

"The NAQS objectives for PM10 which are in line with the EU Limit Values, although the assessment method for the EU Limit Value allows several factors to be taken into account, including the influence of natural sources."