Re: Low Pressure#1668110 By AlanM - Thu Jan 24, 2019 12:55 pm Like 1 Thu Jan 24, 2019 12:55 pm #1668110 Inbound/outbound aircraft will get the QNH for the airport that they are going to/from. There is rarely more than one or two hPa difference amongst the London airports so it is seemed irrelevant. PaulB liked this