One Direction's Liam Payne said: "The pictures I have seen of little children in between the ruins made my heart break.
"All of us in the band are shocked by how many people need help, so we're asking the public to continue to be as generous as they possibly can."
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The crash derailed three train cars.
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Some 38,000 Aston Villa supporters will travel to London on Saturday for the Championship play-off final.