The 50 financial technology (fintech) businesses most likely to revolutionise the world of money, from currency transfer start-ups to invoice sharing apps, have been unveiled - and almost two-thirds hail from the UK.

The FinTech50, now in its fourth year, aims to celebrate the most exciting and innovative companies shaking up the traditional finance industry.

Among the UK companies chosen for the accolade are AimBrain, a start-up that wants to eradicate the password. The Edinburgh-based company makes software that tracks and learns how a person interacts with mobile devices, from typing speed to how hard they press or where they swipe, to authenticate the user.

Digital Shadows, which has been created to fight online crime, also impressed the industry judges with its suite of tools, which can catch cybercriminals by detecting if an employee's email address has found its way into a dodgy digital file, for example.