To save lives, but also to put London at the forefront of a clean vehicle revolution and spare its air pollution shame, the Mayor of London needs to introduce a ban on the dirtiest vehicles being used in the capital.
Hundreds of passengers have been stranded.
It is the latest demonstration involving anti-racism activists, who brought traffic to a standstill outside Heathrow Airport
It could spark a landmark legal ruling.
A grieving mother has described the "horrendous" asthma attack - she suspects caused by air pollution - that killed her daughter