This film is taken from Ian McEwans novella, which ran to only 160 odd pages. From memory, it was an excruciating painful book to read, full of silences and the lack of language. I was left with a feeling of the small tragedy and pathos of it all.
That novella has been padded for this film, and everywhere the padding is, it veers off course. Even though Ian McEwan himself was involved in the production of the film, the ending is just awful and all I could do was look at the prosthetics and think about how implausible the whole scenario was. Despite excellent acting from the wonderful Saoirse Ronan, the film’s a bit of a slow dud.
My rating: 2.5/5 (or may be 3 once I get over my annoyance at the ending)
The Resident Judge of Port Phillip 
Back in 2007 I was still reading all books short listed for the Booker Prize as my best guide for selecting which novels to read. I thought On Chesil Beach was a truly memorable book!
The trouble with reading the book _before_ seeing the film is that the film director has his vision and I, the viewer, have mine. Films very often disappoint.
Thanks for the link
Hels
https://melbourneblogger.blogspot.com/2018/07/can-great-book-be-made-into-very-good.html