In respect of the monitoring of concentrations of nitrogen dioxide and/or particulate matter by the London Air Quality Network in Cromwell Road: (i) why is no data reported from around May 2010 to around September 2010?; (ii) what investigations has the GLA Group made into the omission of this data?; (iii) what did the GLA Group know about the omission of this data and when?; (iv) what efforts have the GLA Group made to rectify it?; and (v) what consequences might there be for the ratification of calendar year 2010 data?