Well, let's necro the** smeg** out of this. Is sixteen years a record? Anyway....

A number of points: lords are not known for speaking in regional accents. The Duke of Northumberland sounds nothing like a Northumbrian, because he speaks in an RP accent. Hugo Myatt also speaks in an RP accent. Certainly, he sounds "posher" than he did as Treguard, when he was amping up the drama in his voice. There are plenty of people who come from a region and sound nothing like the plebs who live there, because they were from a family who usually spoke RP. A good example would be the actress Rose Leslie, who speaks in a cut-glass RP way, because she went to boarding school as a child (I think in Somerset), but is actually Scottish.