Interesting to see that CAP 413 seems to use both Regional Pressure Setting and Regional QNH - is this what BlueLine meant about it being updated?
I'm afraid I'm with many others on this one - as a controller if someone asks for the 'XXX Regional Pressure Setting', the 'XXX Regional', the 'XXX Regional QNH', the 'XXX Regional Setting' or the 'XXX QNH', I know exactly what they want. If I'm in any doubt I'll check - that's the beauty of R/T.
I trust that GoWest is as correct and precise whenever he passes a position report or requests a clearance.
We're all human.