Noel Clark was good in this, so was Sam Claflin. Tim Spall did a decent job too. This movie is quite entertaining in the end but has a fair few flaws.
It is very slow at the start, and spends ages focusing on side characters. The wife (girlfriend?) in particular gets about 25 mins of screen time at the start but all you get from it is that the ex con has a family he cares about. That could have been done in five mins. On the flip side a key scene in a car where you see important corruption and power play moves gets 30 seconds of screen time. Just a lack of focus there.
On top of that the characters are inconsistent, for instance the villain is basically playing the existing system and using it to his advantage. Then there is a scene where he talks about being in favor of brexit. Why? He is clearly benefiting from the system in place why would he want to undermine that? Makes no sense.
If the script had been tightened up and the characters made a bit more consistent it could have been good but as it is its just kind of okay.