Autumn's impending arrival means you're probably already thinking about overhauling your wardrobe for the new season. But nothing helps make a better first impression on your first day at uni or back at work after that sun-soaked summer sojourn like a sharp haircut. We caught up with the grooming gods at The Owl Barbershop to update you on three of the strongest hair trends to try this September – just don't try to nail them all at once.