Three colour mixing of deviation from the expected for 129,211 census enumeration districts on an equal population cartogram — software by author on an Archimedes computer.
The most distinctive feature of this image is of the relative increase of the Welsh in the Valleys. In reality South Wales has had the lowest emigration rates, and so appears to have increased its Welsh population. The white rings around London, Birmingham and inside Leicester, are where the overseas born population has increased. The English have grown in number in North Wales and the Highlands, while some parts of Glasgow have become even more Scottish.