Retention tanks are set be fitted to high-speed trains to stop the dumping of human waste onto railway tracks. The practice of dumping sewage on the railways was ended in Scotland in 2017. However, it was reintroduced last year after delays to a new fleet of refurbished trains forced ScotRail to hire carriages without toilet waste tanks. The rail operator said it was 'doing everything' it could to meet a UK-wide ban on dumping the waste by 2020.
Waste tanks are to be fitted to high-speed ScotRail trains to stop sewage being dropped on to the railway line.