If they weren't securing a charge it's vanishingly unlikely you'd have been able to obtain them from land registry so I think we can knock that suggestion away pretty swiftly.
Do you mean they weren't from the land registry? Because they were - that's where Chloe got the documents from, she says this in the interview.
I just think it's interesting that she admits to googling the wrong solicitor and not realising til after the event and the wrong solicitor not pointing out the fact that they were not the person she was looking for and Chloe not establishing that. It kind of points to a less than forensic dive (viz. the wrong French property they published in the original story).
It also speaks to the approach she took with the medical experts she contacted for the story who gave general views: 'this is unlikely', 'I've never seen this', vs the actual neurologists who actually examined Tim/Moth (one of whom told them the charity PSPA , for those with PSP and CBD, would be helpful for his condition).
I feel like there's some conjecture and some facts and I can see why there's a push-back on the story from commentators (outside of MN!)