From today, 23 October 2017, a £10 Toxicity Charge ('T-Charge') applies to the older, more polluting vehicles in central London.
This is one of the steps the Mayor is taking to clean up London’s toxic air, a step the vast majority of you favoured during the Clean Air Consultation last year.
Here's what you told us back then in the relevant discussion.
Our Air Quality team has put together a list of frequently asked T-Charge questions.
Since the T-Charge was announced, have you made any changes or will you be making some? You might have switched to cycling or using public transport more often, used the online vehicle checker to see if your car was affected or swapped your car for a greener one.
Tell us in the discussion below.