I noticed that Astromega YJ14 LFM (50275) has been
partly tracking today and on one journey took the road from Forfar direct to Perth via Coupar Angus. I've traced this back and I think this is the 1630
M92 Aberdeen to Edinburgh via Edinburgh Airport as this service does miss Dundee (goes non-stop Aberdeen to Perth Broxden). Is using this route rare? I've only used the via Airport service once, it was going northbound, and the service took the usual route but just stayed on the dual carriageway in Dundee.