Why do you all keep banging on about regional pressure settings? Regional pressure settings are primarily intended for non-radio traffic, either because you don't have a radio, or are flying out of radio contact of a nearby facility. They are intended as a last resort - if you lose contact with an ACTUAL source of pressure setting information (a nearby ATIS, an airfield, whatever), you can resort to the RPS. Converserly however you should NEVER set the RPS if you have access to better and more current actual pressure information. Which, in the UK anywhere South of Dundee, and North of the Channel, is pretty much all the time. (Except for those of you who do actually fly NORDO).