One of my wryest memories of the loco-hauled era on the Highland Main Line is observing, in the late 1980s, diesel locomotive 47 635 Jimmy Milne (named after the former General Secretary of the Scottish TUC) rescuing the failed 47 991 Confederation of British Industry at Inverness station. The 'worker' survived into preservation at the Epping & Ongar Railway, but 'the boss' succumbed to the breaker's torch at Booth's of Rotherham in 2013.