Regional accents are a form of class warfare in the UK. Speak in a Scottish accent in places in England and they'll immediately think you're a thick Jock bumpkin looking for a hand out at the job centre.
The tiering is as follows-
Tier 1 is English public school
Tier 2 is southeast England / Greater London
Tier 3 is east anglia
Tier 4 is south west England
Tier 5 is east midlands
Tier 6 is generic English accent.
Tier 1000 is Scotland, Wales and Northern Ireland