Although I am originally from Yorkshire and believe that I have not lost my Yorkshire accent, I was talking to someone at work a few months ago and he asked me where in the East Midlands I was from. He guessed that it was probably Nottingham. I told him that I lived in Nottingham for 5 years and then Leicester for another 5 years. Incidentally I have a couple of friends where I now live in Bristol and I picked up their Leicester accent as soon as they spoke.