Movie was decent but the novel is way better
I haven't read the novel in a couple of years but I don't recall Trevor's mother being from the UK. There were a lot of scenes taken out from the novel but the part that got me disappointed the most was when Ben breaks down apologizing for what happened to his ex wife saying that the accident was his fault. At that moment in the novel the ex wife comforts him and forgives him. It would've been a wonderful scene to watch in the movie. Overall the movie did a pretty good job depicting the novel but it was strange how they decided to take out the daughter and only have Ben have a son in the film.
Edit- I guess for the budget they didn't want to add another actor to play the daughter.