Ruby, as you have now come to understand yours is a classic case of emotional abuse. does he control the money, does he complain on expenses, does he criticise your hobbies, or basically make you give them up ? Does he dislike your friends & family ? Does he effectively isolate you ?
As you know it can come in cycles, whereby he may now start being remorseful, or apparently changing & begging you to rethink, that he realizes he has been unkind, it's the stress of work, he will try harder, he will go to therapy, he will make amends.......
NO, don't be suckered, its part of the game, he may indeed start to be pleasant & repentant, but it is a symptom of EA.
Cut your losses, get a good family lawyer, (possibly female ?)
This changing bank thing sounds like he is doing something dodgy to me.
Start making notes of all the most extreme cases of EA you have experienced, like the ring episode. to be able to make you situation crystal clear to the lawyer
Please get copies of mortgage deeds/pensions/savings/passports/ as many docs you can find, if you can't find them try ringing the mortgage copy & ask if you can get a copy. are you joint owners? do you have joint bank accounts ? if so, open a new account for yourself & start putting money in it. don't tell him & make sure your statements are addressed to you, if there is any chance of him getting to the mail before you, then get stuff sent to a friend.
Make sure you change passwords on your phone & computer.
As for starting to stand up for yourself, I'm not entirely sure you should, I think you should remain completely neutral for now, whilst you prepare your escape. Because it is an escape from misery.
Have you got a sister ? you really do need to confide in someone in real life. Someone to tell you,whilst looking at you in the eye, that you have been in an abusive marriage, that it is not uncommon, that you are guilty of nothing, & are entitled to say "enough".
Go onto WA site & do the questionnaire re whether you are in an abusive relationship, how many boxes did you tick ? Does that confirm to you, that you are not imagining this ? YOU ARE NOT.