Traders across the City are coming under surveillance like never before. Stung by losses and fines from rogue traders, banks are analysing emails to detect mood swings, tracking which colleagues go to lunch together, and hiring intelligence experts from the armed forces.

Under the Senior Managers Regime, top executives are now personally liable if trading misdeeds can be tracked back to poor management. As a result, they are looking for new technologies and skill sets to keep a much closer eye on their trading floors.