The BBC have reported that if Scotland becomes independent it will lose transport subsidies which originate from Westminister, which will mean they need to reduce transport running costs. They didn't specify how this can be achieved but I imagine the options will be: 1. Service cuts. 2. Looking at cheaper options for rolling stock. The second would obviously be the better option. Maybe they could switch their 334s for 323s or their 156s to 150s to achieve this.