The latest census release may be restating the figures we mapped back in July, but it includes one difference – the population of each local authority in England and Wales by single year of age. Which means we can look at where all the babies aged under one were in 2011, and where the big increases have been since the population estimates ten years earlier in 2001. It shows big increases across the two countries, except for 22 local authorities where the numbers of babies went down. And the biggest increases? London, the Midlands and the North. There’s lots of nuances in the data – what can you tell us about it? Click on a local authority to see the data – and use the dropdown menu. SEE INTERACTIVE MAP.