He could have at least not gone to a place with no witnesses.
I was honestly confused by why he didn't escape. He (and others) seemed to magically be able to do everything else, yet a simple slipaway was not a possibility.
Movie has the wrong tone and the whole film was miscast. Book was way better by far (and that's not a standard 'book better than the movie' comment -- the movie is Hollywood and the book is about as British as it gets).