I am sure I looked before and could not open one. I have no UK address so that route is closed off too. I have the account just for transfer of money though, not banking.
You should realy state you are talking about reporting in Bangkok.It depends which office as going early is optimum in places like Chiang Mai and Jomtien. Not all offices have same situation or operations.
Do you mean just move into a hotel a few days before the 90 day is due so you have a TM30 from the hotel or guesthouse. Should be OK but will the hotel etc give you a TM30? Some immigration offices want a physical paper while others are just fine with it registered on the system. PS: Why are you trying to do the TM30 yourself in the first place?