While we can’t deny that NYC and Paris lead many of the fashion and beauty trends, we can’t forget that London is constantly blowing us away with their bold styles, too. Whether it’s choppy bobs or puffer jackets, Londoners are no slouches when it comes to looking chic. And according to Alex Brownsell, a celebrity colorist who counts Harry Styles, Rihanna, Cara Delevingne and Maisie Williams as clients and is the co-founder of Bleach London, there’s one beauty trend in particular that’s making a big splash across the pond right now: copper hair.