In case anyone needs an answer to this question in the future. You just need your old account number and passport. It is easier to bank with someone you've already been with as the threshold for opening is lower. Otherwise I would have needed two forms of ID, a letter of employment, housing already set up (permanent address), and a few other things before I could try to open. This would have been difficult as I currently am in temporary accommodations, am trying to get my phone unlocked, etc.
