The statistics behind the ULEZ got a battering in the Sunday paper.
Firstly, the claimed reduction in pollution is dubious. It’s only older more polluting vehicles that attract the charge and over time, those gradually drop off the register and are scrapped. I think a 40% reduction is claimed but independent analysis says 37% of that is natural and only 3% to ULEZ.
Secondly, there’s a discrepancy in the percentage of vehicles liable to the charge. The mayor is quoting a low percentage “seen driving” in the zone. That of course includes people driving into the city on business or commuting to highly paid jobs. Those people tend to be above average earners with newer cars. The proportion of older vehicles registered in London is much higher. Whilst there are areas of great wealth in London, there also much larger communities of ordinary people resident in the city and once they’ve covered the costs of a home in London, many of those are likely to have older cars.
It’s all smoke & mirrors and of course, the mayor’s research was commissioned and paid for by the council has never been peer reviewed as proper academic research would be.
Lastly, the mayor quotes 4.000 deaths a year due to poor air quality. In fact, that number is cases where air quality is mentioned as one of several underlying health problems. That’s not the same as 4,000 deaths being caused by pollution. If you have lung cancer, it’s going to kill you, ULEZ or not.