@freemo That's only a subset of UK accents, but yes, some people do that lol Here's an good video on it.
https://youtu.be/wDdtdeHZ4pI?t=97
This guy is also an excellent resource on interesting quirks of various dialects of English https://www.youtube.com/@DrGeoffLindsey/videos
@johnabs I gigled more than was probably expect for that video :)