Thanks NorthClyde320 and Metal Mickey. That's exactly what I was wondering... some stipulation from NHS/SPT had Stagecoach obligated to run the X19, hence the arrangement with WCM to avoid failing to do so. If McGills fulfil that obligation with the 23 then Stagecoach will be free to just pull the plug on the X19 and then maybe WCM start their own X19 just Glasgow - Easterhouse, or it just ceases. There certainly doesn't seem to be anything permanent about this arrangement with WCM from the outside. And it doesn;t seem the Stagecoach way... if they wanted to ditch the route they would ditch it without a thought, but somehow they've had to hang on here.