List the relevant details that will help the bank identify you as a customer: full name, address, postcode and telephone number, as well as the account number and sort code.
Customers who bank online are able to transfer money between their account and that of another person: all they need is an account number and sort code.
Names, addresses, dates of birth, phone numbers and email addresses were stolen and 15,656 of the customers had bank account, including sort code, details swiped.