For what it's worth, the aire operators have told me that the barrier is at:
57.694206, -2.8192967
existence.delight.mainframe
My comment re lack of coordinates was really a comment on a lack of vital information on their web page. They apparently intend to place the info on a Facebook page, which I have pointed out to them is not helpful to those who avoid antisocial media.
Google Maps relies to some extent on users to add locations to the maps and three are numerous examples of locations being duplicated, incorrectly positioned, etc. There is a reporting system available on Google Maps, but it is not particularly well designed.