Totally disagree with the people saying this doesn't look accurate for the time and completely agree with the person saying it depends on where you lived and what you were into.
In 86 I was in my mid teens in a medium sized industrial town in central Scotland. I was into indie and punk music and hung about with an assortment of punks, mods, goths, scooter boys, psychobillys and skins. Some, like with Sean and the other characters, a few years older than me. Everybody even vaguely 'alternative' tended to hang about together and had little to do with the casuals and neds. This is England 86 is a total flashback for me, and the clothes and hair are for the most part bang on.