DB6 wrote:
Personally I find regional QNH to be fairly useless. If you don't want to use 1013 - and I don't bother if I'm just farting around aka enjoying flying - then I would recommend using the QNH of any airfield near your track (within 25nm if you want to be correct), and I would further recommend using ATIS broadcasts to get them as you don't have to bother making R/T calls then.
And if there are no other airfields within 25nm of your track and there is high terrain that extends above the 3000' TA? RPS (or Regional QNH as you call it) does have its uses in some UK locations a little further north than where you are.