Locke: Closed Captioning a Must
I highly recommend you turn on the CC while watching the film "Locke" (starring Tom Hardy) especially if you are NOT from the UK. My Mom was deaf so I've used CC in general for years and discovered it helps when I'm watching anything with people using accents not the same as my own. I was missing a lot I didn't realize.
Since the dialogue in "Locke" is the most important thing and there are several different people talking and there's not much happening on the screen you will miss while you are reading, watching it with Closed Captioning is the best advice I can give you.
THEN, go back and watch it AGAIN to pick up the details in the car because the "set design" is extremely important too. Look carefully at everything IN the car. WHAT is there & WHERE it's placed is important. (Example: on the Passenger seat you will find those wooden balls that make it comfortable to sit if you're in the car for a long trip. You usually NEVER see them on the PASSENGER side. That means TWO people sit in this car a lot. It speaks to the marriage and personality of the main character.)