Starred up means you are leader. 
Impressive tricks by the felons who hide their weapons and other stuffs which can be useful for their defense. There is no exact story, scene by scene, it just replicates the real prison's daily activities and experiences that one can go through. It is not a greatest prison story ever told, but the contents were so powerful, like, as I said it was kind of inspired by a real person's. Jack O'Connell was unbelievably good in his role. He's having a wonderful time right now and I am eager for his next venture 'Unbroken'. The other characters were not that exposed as he was, but given equal good performances. I have not seen any prison related movie recently and this movie surprisingly met above my expectation.
7.5/10
8/10