The salon that Keira Knightley, Sienna Miller, Emma Watson and Claudia Schiffer frequent to get their hair done, Hershesons’ star power is unrivalled. And as one of the first salons to roll out blow-dry bars across the UK, they know a thing or two about guaranteeing bouncy, long-lasting locks. With locations in Fitzrovia, Belgravia and inside Selfridges they're some of the best-located spots in town too. Last month, they also launched the Wavemaker, an automated alternative to traditional tongs that brings expert salon finish into your own home if you're really strapped for time.