In November 2016, approximately 20,000 Tesco Bank customers found themselves out of pocket after one of the largest ever cyber-attacks on a UK bank. The incident raised serious questions about the bank’s security and, indeed, the security of UK banks in general. With experts warning that the attack was just a precursor of worse to come, Populus set out to discover just how big of a concern the issue of security and bank fraud is to the UK public. We wanted to know how their attitudes affect both their day-to-day behaviour and more long-term decisions related to banking, and what this means for the banks themselves.