According to the account in
The Salt Path, two events in 2013 triggered the decision to walk the
South West Coast Path. Moth was diagnosed with
corticobasal degeneration (CBD); and the couple became homeless after a business deal with a friend went wrong. According to a 2025 account in
The Observer, the couple lost their home, which was near
Pwllheli in
Caernarfonshire in the
north-west of
Wales, after Winn stole £64,000 from her employer, where she was working as an accounts clerk. To repay this amount plus legal costs, the couple borrowed £100,000 from a distant relative with 18% interest per annum payable, secured against their house. In addition, they were both out of work, and had a £230,000 mortgage against the same property; the combined debts exceeded the value of the house. After the relative's business went bust, the debt was sold on, and the Winns, unable to repay, were taken to court. The Winns lost the case, and the house near Pwllheli was repossessed. As for Moth Walker's illness, the article said that "nine neurologists and researchers specialising in CBD" who were spoken to "were sceptical about the length of time he has had it, his lack of acute symptoms and his apparent ability to reverse them". Winn stated she was questioned but not charged, nor did she face criminal sanctions; a settlement was agreed by both parties. Winn claimed she settled because she did not have the evidence required to support what happened. The BBC reported that one letter appeared to show that Moth had previously been considered as having an "atypical form of corticobasal degeneration", but further examination suggested he may have "an even more unusual disorder, perhaps monogenetic". In the light of the allegations in
The Observer, a charity dedicated to CBD and the related illness
progressive supranuclear palsy (PSP), the PSP Association, ended its relationship with the Winn family. The two companies that produced the film adaptation,
Number 9 Films and Shadowplay Features, stated that no issues were known at the time of filming, and that
due diligence had been carried out. Wynn repeatedly claimed that The Salt Path was the first book she had ever written, although she had previously written and published one under the alias Izzy Wyn-Thomas. == Writing career ==