Thanks, I've told the person about that news article, will see what they say. It might just be that they were unaware, but for AAISP I am surprised if that's the case.
EDIT: I've been told it's not possible as I'm on a TTB line, if it was BT instead then it could be done. So basically I'd have to switch backhaul, which would effectively reset DLM anyway. But that isn't an option either as I'm still in contract, oh well. Maybe if I apply a lower banding it might encourage DLM to relieve the current banding?