People use bad password

https://www.troyhunt.com/86-of-passwords-are-terrible-and-other-statistics/

TSB bank security issues

https://www.nakedcapitalism.com/2018/04/tsb-train-wreck-massive-bank-it-failure-going-into-fifth-day-customers-locked-out-of-accounts-getting-into-other-peoples-accounts-getting-bogus-data.html