Emergency hospital admissions fell after introduction of London's T-charge and Ulez, study suggests

Imperial College scientists analysed health records and found emergency hospital admissions reduced after London introduced air pollution reduction zones (T-charge and Ulez), building on prior evidence of reduced GP visits for respiratory/cardiac problems in similar schemes.

This does not prove causation definitively or isolate the T-charge/Ulez as the sole cause of admission reductions; other factors may contribute. The study is observational rather than experimental.