The Scottish Government is aware of appraisal work relevant to the named corridors, that has been undertaken or ongoing by other parties:Scottish Planning Assessment (which informed the Route Utilisation Study), August 2006, Network RailRoute Utilisation Study, March 2007, Network RailScotland Route Study, 2016, Network RailWesterton-Milngavie - A81 Milngavie – Bearsden Corridor Study, STAG Final Report, March 2015, East Dunbartonshire Council;A81 Transport Options Appraisal Study, February 2017, East Dunbartonshire CouncilHelensburgh Central – Fastline Faslane STAG Study, Hitrans (with funding from Scottish Government – Local Rail Development Fund) S6W-01944