The Great Western Railway (GWR) train, a specially adapted former District Line train, travelled overnight along a 200-mile (322km) route from Reading and back again via London Paddington and Oxford. It reached 140 miles (225km), breaking the record on Brunel Maidenhead Bridge at about 04:00 BST. The previous record of 139 miles (224km) was set by German train company Stadler Deutschland in Berlin on 10 December 2021.