Not OP but in Southeastern England obviously Cockney, Estuary English, or Multicultural London English are considered lower prestige dialects whereas RP is high

Not OP but in Southeastern England obviously Cockney, Estuary English, or Multicultural London English are considered lower prestige dialects whereas RP is high prestige. Other regions may have a prestige version of the local dialect that incorporates some RP features while retaining some local features, but broadly speaking, regional speech patterns have lower prestige because they tend to be more prominent among people with less education.