Publishing house Penguin has said it "undertook all the necessary due diligence" before releasing The Salt Path, after a series of claims about the book's veracity. A recent Observer investigation claimed English author Raynor Winn fabricated or gave misleading information about some elements of her 2018 non-fiction best-seller.

Controversy now surrounds the story Raynor Winn wrote about her 630-mile journey along the South West Coast Path with her husband Moth. The 2018 memoir was recently made into a film that took around $16m (£11.7m) at the box office globally.

In her bestselling memoir, Raynor Winn claims she and her husband endured homelessness, terminal illness and economic hardship. Now, her story might be unravelling