I applied online. The next day I received an email asking me to call HR and arrange for an interview. At the interview I was made comfortable. I was asked to do some basic math test and currency exchange test, which I had half an hour for. It is very important not to make any mistakes. After that I was asked many competency questions. Make sure you ask some questions back. It is important to show your intrest in the job and good to mention why you want to work for sainsburys bank. We discussed the hours, rota, uniform size, holidays etc. The overall experience was good. If you well prepared and do research about sainsbury you should be fine.