I think some of the past housemates have played their accents to the full. Nush has what I call a 'nothing' accent. She could be from anywhere. Probably went to a good school where they gave them elocution lessons and made them speak 'properly'.
I think most people can speak with an accent or without as is suitable for the occasion.
I am afraid when a group of my friends and I get together we get to be quite Bristolian sounding just like Katie from Fame Academy, but then again if I am mixing in polite society i.e. something like TIBB


then I can put on what my children used to call my posh voice and actually sound as if I come from nowhere in particular.
An accent is an accent. What annoys me is the terrible British accents that Americans put on when they play the role of a British person. Now that is BAD.