A mystery in the Lake District as a mum goes missing without trace. 21 years later divers find a body weighted down and concealed in a canvas bag - but despite the best efforts of police the killer husband of Carol Park remains free for another decade.

Now journalist Jeremy Craddock has documented the fascinating story which reads like an Agatha Christie novel in his new book The Lady in the Lake.

Nicola speaks with Jeremy about a mystery that took more than three decades to solve.

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