To mark the 60th anniversary of the Clean Air Act, we’ve been asking Guardian readers to share their memories and stories of what the UK was like before the act came into force.
You can see all the contributions – or submit your own – via GuardianWitness
Tuesday 5 July 2016 06.00 BST
The great smog of 1952 swathed London in a toxic smog of pollution, resulting in thousands of deaths over a four-day period. The Clean Air Act was a groundbreaking piece of legislation that led to the phase-out of coal in Britain’s towns and cities.