Newham's been named the most deprived area for quality childcare.
A report published by thinktank Policy Exchange claims the poorest areas have the fewest nurseries and childminders rated outstanding by Ofsted.
Tower Hamlets and Hackney were also in the bottom five.
The figures were calculated on a neighbourhood by neighbourhood level.
The YouGov poll of 1,637 people carried out for Policy Exchange also shows that people on lower incomes are less able to choose high quality childcare because of cost constraints.
Top five areas providing quality childcare.
Bottom five areas: