God, I've 'wasted' so much of today reading both threads and have finally caught up!
For those asking if the film company have made any statements - there is this one right at the end of the BBC article:
A spokeswoman for Number 9 Films and Shadowplay Features, who made the screen adaptation, said in a statement to Hollywood trade publication Deadline, external: "There were no known claims against the book at the time of optioning it or producing and distributing the film."
Their statement called the movie "a faithful adaptation of the book that we optioned", adding, "we undertook all necessary due diligence before acquiring the book”.
"The allegations made in The Observer relate to the book and are a matter for the author Raynor Winn," it concluded. "We have passed any correspondence relating to the article to Raynor and her agent."
The film's stars Anderson and Isaacs, have also been contacted for a response. BBC Film, which also helped finance and executive produce the movie, declined to comment.
The film adaptation has taken around $16m (£11.7m) at the box office worldwide. The movie is yet to launch in Germany and France, while a deal is reportedly still pending in the US, according to Deadline.
https://www.bbc.co.uk/news/articles/cm2z0707mlgo