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Nathan Filer 'shocked' at Costa Book of the Year win

28 January 2014 Last updated at 21:26 GMT

Nathan Filer has won the Costa Book of the Year with The Shock of the Fall, his debut novel about loss, guilt and mental illness.

The book follows the experience of Matthew Holmes, a 19-year-old who is haunted after witnessing his brother's death at a holiday park in Dorset.

Filer told the BBC's Rebecca Jones he was both "shocked and delighted" when his name was announced.