A few minutes' walk from Tufnell Park station in north London, a steady stream of teenagers is flocking towards an industrial area. Muffled 140bpm beats thud through the walls of a warehouse, where a crowd gathers outside a door that’s clearly been forced open. The crowd is young, and the music is mostly drum’n’bass. Inside the warehouse, the first thing we see is a ‘Nos’ bar, selling nitrous oxid
![Illegal raves: How the underground scene has never really gone away - BBC Three](https://cdn-ak-scissors.b.st-hatena.com/image/square/d2d4244e0247cd694388cc79d43782f1eb660257/height=288;version=1;width=512/https%3A%2F%2Fichef.bbci.co.uk%2Fimages%2Fic%2F704xn%2Fp0663p8j.jpg)