[tboughen]

Yes and no. I used to have a regional accent that was a soft mix of Lancashire and Yorkshire accents. I now work in south Worcestershire, and the local accent is pretty much modern RP. In adulthood, I softened my accent further towards RP to such an extent that people think I’m local.

What you are probably referring to is the ‘educated European twang’ that often remains when people are targeting the RP accent from 50 years ago.