Since this blog from 2008, data from the Census 2011 revealed that many cities gained population since 2001, in particular Manchester with a growth rate of 19%. In many core cities of the main conurbations this growth was driven in particular by large scale residential development in and around city centres realising some of the ideals of the urban renaissance project. So for this blog I updated Alasdair's analysis using 2011 Census data and comparing this to Census 2001 figures, summed up in the following table
I sorted the table by rate of percentage change between 2001 and 2011. It's not surprising to see that London shows the highest growth rate. But it's interesting to note that looking at this spatial scale puts the high growth rate of 19% in the city of Manchester in perspective once the wider city region is included. In comparison Nottingham and Bristol are showing slightly higher growth rates. At the bottom of the table are Newcastle and Liverpool. Despite high growth rates in and around the centres of those cities, developments in the wider city regions were more mixed.
The following map shows the location of the 15 mile buffers in combination with the table. It's worth noting that in some cases the unusual geography of a place makes comparison quite difficult. For example the places near the coast have a much smaller hinterland than the places inland. Furthermore Liverpool also includes parts of Flintshire in North Wales. And particularly the smaller conurbations like Bristol or Nottingham include large areas of rural hinterland in the 15 mile radius.