Well done.
Once you've identified her accounts you can regsiter for POA on some / all - as you think necessary. You shouldn't need to open a new account for AA, as long as it's paid into an account you can access. It probably makes sense to pay it into the same one as her pension.
Keep the faith. Like @Jaded'n'faded , I wonder if your brother won't decide to simply walk away once you get all the information together. Don't worry, you can do this.
Once you've identified her accounts you can regsiter for POA on some / all - as you think necessary. You shouldn't need to open a new account for AA, as long as it's paid into an account you can access. It probably makes sense to pay it into the same one as her pension.
Keep the faith. Like @Jaded'n'faded , I wonder if your brother won't decide to simply walk away once you get all the information together. Don't worry, you can do this.