Thanks for the comments and advice. I may have called the marriage visa an extension in error.
My wife will get her blue book and use that. I will open the bank account when there.
So to have proof of residence for a bank account and marriage visa, in addition to my wife’s blue book, I need a certificate of residence, and I get that from the immigration office after having completed a tm30 form and shown my wife’s blue book? I don’t need a yellow book?
Sorry if these are obvious questions but there’s a lot of different info online.