Lloyds Banking Group has identified the glitch that led to some of its customers being able to see details of other customers’ transactions on March 12. It revealed the information in a letter to the UK Parliament’s Treasury Committee, setting out the details of the incident and how it has been handled. The issue arose after an overnight IT change meant that two customers who accessed their accounts simultaneously could have sight of each other’s accounts, it said. The bank said that fault was because of defect in “the design of the code used to update the Application Programme Interface (API) used by the app.” It didn’t go into any more detail about the precise nature of the defect. The com...