Thank you for your reply.
Yes, definitely. I had initially thought they would just switch it to coming out of my husbands account and then things went a bit off the rails with my illness so it wasn't at the forefront of my mind and I forgot.
I've been worried about all these mortgage increases and trying to learn about what to do when it suddenly dawned on me but I'm afraid to call them in case they want it all back in one go cause I can't do that, I didn't even know there was interest till you mentioned it.