Pacer
Most Pacer trains were put out of use in 2020. Two things finally made this happen. The first is that it is difficult for people with disabilities to climb onto Pacer trains. The Rail Vehicle Accessibility Regulations require that all public passenger trains must be made easy to use for disabled people by 2020 - but they made an exception for the Pacer trains until the end of 2020. Only one Pacer (the modernised 144e) follows this rule right now. The second is that the Transport Secretary made a decision in 2015 to retire the Pacers by 2020 for the then-new Northern service, arguing that it would be bad for the economy in the north to keep using "these uncomfortable and low-quality vehicles".