As the Privatisation of British Rail began , this project became unviable as resources were concentrated on the privatisation process , leading to the famous 1064-day ` drought ' of new train orders . By the time this period was over , plans had moved on and Stratchclyde ended up receiving a batch of Class 170 units . Unfortunately , as the privatisation of British Rail began , this project became unviable , and Strathclyde ended up receiving a batch of Class 170 units .