BA cites independent studies commissioned by Britain’s Department for Transport which found "no evidence that pollutants occur in the cabin air at levels exceeding available health and safety standards".
As exposure levels from the 1940's and 50's were used and incredibly no fume event was published in the Cranfield study - it's true that levels were not exceeded - but it follows that conclusions are simply not valid, as per the following letter in 'Flight'.
http://www.aerotoxic.org/download/do...une%202011.pdf
This is the horsemeat of the airline industry and they know it.