I'm not sure about London, but this has been studied before in other cities and it's been found that the benefits significantly outweigh the risks: https://www.

I'm not sure about London, but this has been studied before in other cities and it's been found that the benefits significantly outweigh the risks: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2920084/ https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2920084/ Unless London is significantly (>~20x) more dangerous than the Netherlands, I'd expect the result to hold there too.