Vivarail, the company which produces diesel and/or battery-powered multiple-units using old London Underground stock, went into administration on 1 December. Managing Director Steve McBride wrote, "It feels like we have performed miracles at times but pedestrian market conditions and a serious helping of mickey taking from one industry player has dealt a severe blow. The task now is to look after our people and find a like-minded partner to salvage the best of what we have achieved."

The joint administrators, Grant Thornton UK, said the "Increasingly difficult operating environment and delays to the anticipated upscaling of key net-zero projects and pilots" had contributed to a funding shortfall "that has not been capable of resolution in the timescales available.