Hey! So Alex has done a great job at explaining some of the future possibilities for revenue generation 
Overdrafts are the most immediate means of revenue generation once we launch current accounts.
In the longer term, providing a marketplace platform where users receive targeted and relevant information on alternative products or services based on their spending habits would be the aim. Businesses would pay to access this marketplace in order to offer their goods/services , which would be the basic model for revenue generation.
Ultimately, we want to do one thing (current accounts) really well and add some real value, instead of aggressively expanding our portfolio of banking products and making money from the hidden costs they incur.