Seems its spread from the harmony of London & Leicester.
https://www.dailymail.co.uk/news/art...wl-Slough.html
https://www.dailymail.co.uk/news/art...wl-Slough.html
Huge gang of yobs armed with 'bats and nunchucks' attack cars and beat each other up in massive brawl at Slough roundabout