Leicester has become the first city in the world to have its air quality mapped out using an airborne pollution-scanner.
This bird's eye image shows how pollution levels vary across the city.
Images were taken by researchers from the University of Leicester from a survey plane flying 900m above the city's roads, parks, industrial estates and houses.
The European Commission is calling on the government to find a solution to improve air quality.
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Demonstrators will gather in Lincoln this morning to protest against proposed cuts to the city's local fire service.
Passengers have been warned to expect disruption on East Midlands Trains this weekend because of work on the main line into St Pancras.
A cold and mostly dry day, with wintry showers becoming more confined to coasts. Brisk winds, especially near coasts.