FYI for anyone needing to send additional documents:We sent 7 e-mails in total and only got 1 verification that 'e-mail 2' had been received.
I e-mailed: SheffieldDocsRequested.RestofWorld@fco.gov.uk to confirm had all 7 been received.
I got a reply to confirm that yes all 7 had now been added to our application
So for anyone else in a similar situation, you can follow what I did.
Has anyone ever got their decision on a weekend before?