Public Health England have requested bans be put in place that prevent cars from idling outside schools, in an attempt to reduce air pollution.
The agency have called for more measures to be implemented that make it easier for children to walk or cycle to school, in turn reducing the number of cars going on the school run.
https://www.theguardian.com/environment/2019/mar/11/ban-cars-from-idling-near-schools-say-uk-public-health-chiefs
Reference: The Guardian