“Parts of the UK are ageing twice as fast as other areas of the country, while in some cities the population is getting younger, a divergence that will have a lasting impact on local economies, local government and national politics, according to new research. …

https://www.theguardian.com/science/2019/oct/28/some-parts-of-uk-ageing-twice-as-fast-as-others-new-research-finds?CMP=Share_iOSApp_Other

The research is here:
resolutionfoundation.org