Influencers, already everywhere you look in London anyway, are growing more brazen in their practices. What was once a small coterie who haunted restaurants like Sexy Fish in Mayfair has grown into a mass of aspiring social media messiahs willing to go to great lengths for the perfect snap. They pose on people's doorsteps, disturb restaurant diners and have a penchant for filming content in busy Tube stations, leaving the rest of us squinting in the glare of their ring lights.