Future impacts of O3 on respiratory hospital admission in the UK from current emissions policies

•Policies on anthropogenic emissions dominate health impacts of air pollution.•O3 simulated at 3 km resolution for 2030, 2040 and 2050 emissions pathways.•Hospitalisations calculated with latest UK health impact assessment recommendations.•7078 increase in respiratory hospitalisations by 2050 for current policy c.f. 2018.•Estimated increases are 2–3 times lower if population growth is not included.