Just six months ago this preppy hairstyle wasnt the height of cool, but thanks to Kate Middleton and co it is the look to sport right now. Tresses like this are groomed to perfection, but there's so much more to it than the flick of a hairbrush and the wave of a hairdryer. From the impeccable cut (kept in check with trims every 6-8 weeks), to the blink-and-you'll-miss-them sunkissed highlights Chelsea Hair is high maintenance. Long, luscious, manes like this require in-salon treatments (permanent blow-dries to add hair strengthening keratin, and glossing to keep it shiny), plus good quality at-home products - Kerastase is Kate and Rosie's go-to brand. Finally, dig out the mousse and style with plenty of volume at the roots, et voila hair that could have been made in Chelsea.