Business and Management Harvard Referencing

Is the business model of challenger banks sustainable?

I need an in-depth academic research dissertation project on the business model of the UK and European challenger banks. Are they sustainable?
Current outlook, risk, risk management, implications, operation in different geographic locations, competition, the regulatory and supervisory framework around the world, the customer group, challenges to the traditional banking… financial stability… with lots of statistics to back it up and of course literature review. Thanks in advance!!