I left the UK almost 20 years ago, and cannot imagine returning for any length of time. My personal take on this is the UK got so used to having an empire, and specifically India, which could absorb more British bureaucrats than the UK could possibly produce. Consequently when Indian independence occurred this massive pipeline of producing people for running colonies had nowhere to go, and a large number moved back t…
We ran the empire with a lot less civil servants than we have now: https://blog.nationalarchives.gov.uk/uk-government-did-we-ru...
In 1891 there were 238,409 with english as their mother tongue (before the census broke this out).