I have been a long-term sufferer of over-processed, dry hair for quite some time (due to previous highlights, ombre and dye-jobs) so for years I’ve been on the hunt for an affordable product I can use without shelling out loads of cash on the expensive ranges always pushed by salons and hairdressers.  So, you’ll be more than happy to discover that after googling ‘Gigi Hadid hair secrets’ at the weekend, I discovered one of her stylists swears by the Salon Science ReCorrect Leave In Treatment, £15, for over-processed damaged hair, which lead to me rushing out to Boots at...