Quintinhill, near Gretna, was the scene of Britain's worst-ever railway accident in 1915, when three trains, including a heavily-laden troop train, collided. 227 people were killed. | Quintinhill, near Gretna, was the scene of Britain's worst-ever railway accident in 1915, when three trains, including a heavily-laden troop train, collided. 227 people were killed. |