MV Cowal in 1954. She inaugurated the regular Wemyss Bay to Rothesay car ferry service, on 1 October 1954 and remained in the upper Clyde for her whole career. From 1957 the three "A, B, C" sisters were working interchangeably. In May 1970, "Cowal" inaugurated a short-lived seasonal Fairlie-Tarbert-Brodick service. When this ended in September 1971, "Cowal" operated between Largs and Millport, until displaced in March 1972 by the former Skye ferry on the quicker Largs to Cumbrae Slip run. With linkspans at Gourock and Dunoon, the hoist-loading "Bute" and "Cowal" were restricted to the Wemyss Bay to Rothesay crossing, where "Cowal"
Highland Scottish Orkney Coaches Ltd) by Stagecoach Group had been finalised. Highland Scottish can be traced back to 1952 when Highland Omnibuses was created when Highland Transport, Macrae & Dick and Alexanders Town Services in Inverness were joined together. In the reorganisation of the Scottish Bus Group, in 1985, to prepare for deregulation and privatisation, the company was renamed Highland Scottish Omnibuses Ltd. Unlike many of the original SBG subsidiaries, Highland's operating area remained largely unchanged. No additional territory was gained, but Oban was transferred to Midland Scottish. The red and grey livery used by Highland Omnibuses was retained for the fleet.