What game is Theresa May playing over Brexit? Some City optimists hope its chicken and that her tough rhetoric suggesting a hard Brexit is designed to scare EU leaders into compromise. Her fans insist she is actually playing poker, cannily keeping her cards close to chest.

Judging by the latest Brexit hearing at the Treasury select committee, an increasing number of City leaders fear that the game is more like Jenga. The block-balancing game has become a favourite metaphor, highlighting the complex and interconnected nature of the Brexit process.