Tornado took 18 years of planning, construction and fundraising
The first steam engine built to run on the UK mainline for almost 50 years is returning to County Durham.
Tornado was funded and assembled by steam enthusiasts in Darlington, during an 18-year £3m project.
The 72ft (22 metre) engine - based on the Peppercorn A1 locomotive - was unveiled in 2008 and takes part in chartered excursion trips.
It will be on display at Locomotion: The National Railway Museum at Shildon from 26 to 30 April.
A team of volunteers from The A1 Steam Locomotive Trust will be on hand to tell its story.
Visitors will also have the chance to go on the footplate and and gain an insight into the experiences of an engine driver.