Boris's remarks on 'buried' air pollution report leave unanswered questions

London's former mayor says he knew about the report showing deprived schools were disproportionately affected by air pollution, so why wasn't it made public?

The former mayor of London's response to claims he buried a report on how toxic air disproportionately affects deprived schools was trademark Boris Johnson bluster. To allege there was a cover-up was "absurd" and "risible", he said. Of course he hadn't hid the impact of dirty air.

But in defending his record on air pollution, he also seemed to make things worse. On Monday we didn't know if Johnson himself was personally aware of the findings of the unpublished report that the new mayor Sadiq Khan accuses him of suppressing.