These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
Complete Monster: Noel Winters. He is a psychotic, misogynistic, sadistic teenager and the leader of a gang of criminals (called "hoodies" in British slang) living on the estate, and he often abuses women for a sexual thrill while also engaging in regular acts of brutality, a lot of which he films on his phone. He and his gang regularly abuse Leonard to the point that the old man eventually tries to fight them with a bayonet - but the gang overpower and kill him, whilst filming his death on one of their phones. Although (whilst captured and being tortured by Harry) Marky admits that, whilst he and the others only really meant to only scare Leonard, Noel was the one who ended up stabbing him. And Noel himself even urinates on the dead man's body. Later, during a riot on the housing estate, he is found hiding with help from his also-psychotic uncle. Having been confronted by Harry (and also having found a female police officer trying to call for help), Noel's uncle tells him to strangle the officer, and Noel takes pleasure in sadistically strangling the woman - and actually encourages her to struggle for her life, as he watches her die!