I think he is, but he is fairly schooled sounding, but with a bit of a brogue. Just how the BBC likes 'em. Course Channel 4 prefers utterly incomprehensible Geordie, but they are on the lunatic fringe.
Actually, I'm a good Cornish boy, so I should probably have an accent that is less acceptable than yours. We moved around the country enough that I managed to neutralise most of the various influences. Also, back in the mid 80's the perfect vocal role model for any young man aspiring to masculine BBC tones was my own favourite Moira Stewart.