Anyone who has followed Save Lea Marshes in the last few years will be aware of our campaign against the planned cricket pavilion for Hackney Marshes, a design which involves building on green space in order to accommodate a large car park on North Marsh.

During our campaign, which led to a public inquiry, evidence was coming to light of the damaging effect of air pollution on Londoners, especially children. Exposure to air pollution stunts lung growth and even impairs children’s…