Watched on Sky/NOW movies.
A Brit Flick which, despite it's sparse budget, is a fun movie
The premise that the "brother turns up due to running someone over" is like saying like saying Kill List is about "2 blokes with an eastend and an Irish accent".
To be honest, from this film's point of view, I wouldn't bother trying to find out anymore as the story will play out in a fun, tough and unusual manner.
I found certain things a bit too unusual for my tastes, but I really enjoyed the journey I was taken on and really don't understand some of the scathing reviews.
Its trots along nicely and with its sparse 84 min runtime, the timing is just right.
I will enjoy watching this again and believe I will get more from it.
Give it a chance you may enjoy it.