Green Arrow was built in June 1936 for the London and North Eastern Railway at Doncaster Works to a design of Nigel Gresley.
Thomas met Green Arrow after his unusual arrival on the back of a lorry to find Green Arrow being repaired.
Green Arrow was withdrawn from service in August 1962, and bought by the National Railway Museum. He would pull rail tours from time to time, but in 2008, was withdrawn from rail tour service. This was because two of his superheated tubes were cracked. These tubes were fixed, but Green Arrow was soon taken away for static display. His boiler was not to expire until mid-late 2008, but it failed shortly after the tubes were repaired. Green Arrow is back in York to be restored to mainline condition. At present, Green Arrow is part of the Flying Scotsman story display inside the National Railway Museum.
- Green Arrow is best friends with Banana Fluff.