Identifying inequalities in childhood immunisation uptake and timeliness in southeast Scotland, 2008-2018: A retrospective cohort study.

•Deprivation strongly associated with uptake and timeliness despite high uptake for all groups.•Delay is greatest for 40% most deprived population and for pre-school vaccines.•Inequalities in uptake have widened since the 2006 birth cohort.•Absolute timeliness improved 2008–2018 but deprived groups showed increased risk of delay.