In England, in 2000 25% of 15 year olds regularly smoked, by 2023 it was 2.5%

For the 11-15 group as a whole it dropped from 11% to 1.2%

Vaping in that 11-15 group was 5% in 2023

So combined smoking and vaping in young people halved from 11% in 2000 to 6% in 2023, almost all of which is vaping

https://ash.org.uk/uploads/Youth-Smoking-Fact-Sheet.pdf

https://ash.org.uk/resources/view/use-of-e-cigarettes-among-...