I haven’t remortgaged with Monzo yet but I will be soon. I meant to update the other thread but nobody else seemed to care so I never got round to it.
After speaking to Monzo they think “mortgage providers are likely to look at multiple credit agencies” and if they check CallCredit or someone CallCredit provides to” you should hopefully be OK”. So you can make your own decision.
One of the reasons I was concerned about this is that after moving everything I was aware of my current account went into overdraft a few times as there were still things using the old card number I hadn’t yet moved.
Also I checked and reporting to other CRAs isn’t going to happen anytime soon. 