Listen, I'm the person who asks hairstylists to skip the hairspray even on the most humid of days, but Warren says this is key for making this style work. "Don't be afraid of hairspray," he said as he — and I'm not exaggerating — bathed my hair in Kerasilk Style Fixing Effect Hairspray (£16). "Seriously. For this style to hold, especially if you have fine hair, you almost need to drench it."