Hello @Andy,
Overnight Thursday into Friday the problem became resolved, either by itself or because I opened a support ticket with customer services via web chat at the beginning of the week. I sent all the same screen images and a few more, the guy said he was "completing a form" for my issue which would be worked on within 5 days.
We'll probably never know what caused it, but for anyone else out there with the same problem, my example shows that it can be sorted, so shouldn't be a permanent fault.
