Lumo, the open-access operator on the UK's East Coast Main Line, exclusively uses a fleet of Class 803 Hitachi AT300 electric trains. These are 5-carriage, all-electric units based on the same platform as LNER's "Azuma" trains but are unique because they do not have backup diesel engines, making them lighter and more environmentally friendly. In 2026, these trains continue to offer a single-class service (Standard Class only) to maximize seating capacity and lower ticket prices between London King's Cross and Edinburgh. Each train features ergonomic seats designed for long-distance comfort, extendable tray tables, and easily accessible power and USB sockets. Because they are 100% electric, Lumo markets its services as a high-speed, low-carbon alternative to flying, reaching speeds of up to 125 mph while significantly reducing the carbon footprint of each passenger journey.