COMEAP Report: The Mortality Effects of Long-Term Exposure to Particulate Air Pollution in the United Kingdom (2010)
COMEAP Report on Particulate Matter (2010)
The Mortality Effects of Long-Term Exposure to Particulate Air Pollution in the United Kingdom 
This report is the source of the 29,000 attributable deaths due to PM's that was later used in the Royal College of Physicians Report.
The report carried the caveats:
"These effects can be expressed at the population level in terms of life expectancy, and on loss or gain in life years. The burden can also be expressed in terms of deaths occurring in a specified year across the population."
"As everyone dies eventually no lives are ever saved by reducing environmental exposures – deaths are delayed resulting in increased life expectancy."
"These measures are averages or aggregates across the population; it is not known how the effects are distributed among individuals."