It was the paean to his backpack that swung it. Jihan Bowes-Little’s ode to his bag, entitled “Goldman Rucksack”. The adrenalin rush the young American banker experienced retelling his dilemma – whether to wear his bag with the bank’s logo facing inward, unseen, or outwards and clearly visible – was his first public performance. It was there in that small west London venue that he decided to pursue a secret life as a hip-hop artist called Metis.

The dual career saw him swapping suits at the end of his office day for baggy jeans and trainers, scribbling lyrics while trading credit derivatives at Goldman Sachs, and taking calls from Tokyo after rapping at steamy gigs. After that first night’s performance, he refused to speak about his banking job to his fellow performers. He tried to keep the double life a secret from both the banking and the hip-hop fraternity – at one point even hiring a public relations consultant to keep his name out of the press.

The inspiration for his second career came seven years ago, when the American became transfixed watching Saul Williams, the spoken word poet. “It was just, like, absolutely mind-blowing,” recalls Mr Bowes-Little, sitting in a private members’ club in Notting Hill, home to bankers and the carnival. “One person on stage captivating a room full of people, no music, no distractions.”