Does anyone watch Talking Dead? They had interview with actor who played Morgan, and like others in cast, he is British. So is lady who plays Hershel's daughter, and so is actor playing Rick. They all have those thick British accents, it's amazing how they can stay in character so well on show.
I was amazed when I saw first Rick in an interview and more recently the Governor. It is really something how they can hide their accent. It seems like it would be so difficult to do.
I'll say it again since on the subject. Part of what makes WD so good IS that the acting is very very good IMHO.
TIS