Thank you @Manci, I will give it a try to email those 3 email addresses you suggest.
And @CR001, In retrospect I can see that this is how we should have proceeded, however, it is contrary to the guidance provided within the UKVI MN1 application.
At the bottom of the Document checklist document, there is a section that says:
What Happens Next
Send your documents to us within 30 working days and we will make a decision within 6 months. We will contact you regarding your biometric enrolment once your documents have been received. Send this checklist and all your documents to Department 4 , UKVI, The Capital....etc
So I hope they can grant us some grace for doing exactly what they asked.

Perhaps we should have gone through a migration agent, as they probably know this.