Serious case of acne and bad Scottish accent
I loved George Mackay in "How I Live Now", I think he is a pretty good-looking lad, but I could not help being annoyed by the acne on his face in this film. I understand he was young and a teen when he filmed this, but he should've gotten himself a dermatologist to sort out his acne problem if he knew he was going to play movie roles.
Also, his fake Scottish accent was kinda poor, in my opinion.