Vandals have attacked two carriages at the world-famous Severn Valley Railway site at Kidderminster, forcing them off the tracks.
Staff at the Worcestershire site confirmed graffiti had been left on the train carriages, including one pulled by the historic Flying Scotsman locomotive.
One of the carriages had the name 'Banksy' spray painted on it, although it's not thought the secretive street artist was involved.
The carriages were targeted at some point between Christmas Eve and Boxing day.
They're now running shorter journeys for some train journeys and have removed the vandalised carriages.
The repair work is expected to last until mid February 2018.
An investigation is now underway.
There's more on the campaign to restore the carriages here.