Using data from the excellent new London Data Store website I have produced a maps showing London’s population density for each decade between 1801 and 2001. An especially interesting pattern from the maps is that of increased population densities in central London until around 1951 and then a gradual decline until 2001. Outer London boroughs show a steady increase and then stabilise towards the end of the 20th Century. Below is an animated gif with the results. You may need to click on it to view the animation.