As branches close and an increasing number of consumers use app-based finance services, high street banks are at a crossroads, with online alternatives set to further shake things up. Atom is a digital-only bank with a range of consumer and business accounts, but can it take digital banking nuclear?

Online banks are booming, attracting over three times as many new consumers as they did a decade ago. And Goldman Sachs is now cashing in on the action. For years, the bank has been the preserve of the super-rich, but since launching online, it's opening up to the masses.

As the financial sector works to make services increasingly streamlined, mobile money has gained popularity as an easy and secure way to handle cash. Now that apps are more readily accepted, banks are leveraging these platforms to reposition themselves as lifestyle brands.

In the US, 80% of consumer spending no longer involves physical dollars, while in Britain cash use has dropped 14% in the last five years. What is driving this shift towards a cashless society? And how will we spend and manage money in the future?