A museum's attempt to set a unique origami record has been scuppered by the Guinness Book of World Records.
The museum is home to steam trains from around the world
Paper-folding enthusiasts gathered at the National Railway Museum in York to create a train of 1,550 wagons, headed by a paper model of Stephenson's Rocket.
Origami enthusiasts also sent in paper wagons from all over the world for the record attempt, including Colombia, the US, Germany and Japan.
But officials from Guinness World Records rejected the 254 metre construction, dismissing the bid as "too specialised".
They said in a statement: "We simply cannot have a record for everything that can possibly be made from origami - animals, trains or otherwise."
The only recognised record for paper folding is the world's largest origami crane, set in 1999.
Museum spokesman Keira Meheux said: "Naturally we are very disappointed with the news, particularly since so many people worked so hard to create the train.
"However, all is not lost because the event was incredibly popular with our visitors, who thoroughly enjoyed making their own wagons to add to the train."
A spokesman for the British Origami Society said he was philosophical about the failed bid because it was still a "spectacular event".