The Office for National Statistics for the UK published an interactive to show how population has changed:
The population of England and Wales has increased by more than 3.5 million in the 10 years leading up to Census 2021. Using the first results from this census, we look at which places have seen the biggest increases and decreases, which areas had the largest growth in different age groups, and how your chosen local authority area compares with others.
You choose a region and go from there. The best part though is the football (a.k.a. soccer) field used to visualize population density, which communicates the numbers on a relatable scale.
