A South Yorkshire beauty therapist was among 50 environmental protesters who halted a freight train carrying hundreds of tonnes of coal to a power station.
Greenpeace said campaigners used industry standard emergency signals to flag down the train as it was slowing down alongside rail sidings leading to Cottam power station in Nottinghamshire.
Some 50 protesters climbed aboard the train and unloaded the coal from open wagons.
The activists said they were taking action to stop the damage to the climate and health, caused by burning coal.
Beauty therapist Jacky Westwood, aged 56, said: “We have been warning our political leaders for years about the human and environmental costs of burning coal. I myself have signed petitions, written to MPs, and been on marches - but they haven’t listened.”
British Transport Police were called to the scene.