Peer-to-peer lending. Robot financial advisers. Crowd funding. Alternative currencies. Every day seems to bring news of another whizzy new financial technology start-up. The industry is exploding, and may be reaching a tipping point where it starts to seriously damage the major banks – a report this week from Capgemini found that 63pc of customers had used a “fintech” product and were more likely to recommend them to friends than any traditional provider.