That's a relief - I thought I was going to have to adjust my inner voice for you. To me you sound somewhere between Miles Jupp and David Mitchell, so changing your voice to Jimmy Nail would have been quite a shift!
People tell me they can't place where I'm from. Other people tell me they can hear it in certain words, but that's only after they know where I was born. But they also tell me I haven't "gone Geordie". So I don't really know what I sound like now
My mother always tried to make us talk proper, so maybe it really is posh Brummie
I thnk it can be the case when you move around you hit neutral. My mother was born in Hackney, raised in Essex, Birmingham and Anglesey and then moved to South Wales. She has no recognisable accent, rather than lurching from Frank Butcher to Rhys Ifans to Gladys Pugh it just sits in the middle. I had a girlfriend once that was raised in Birmingham, York and San Diego and she was the same.