I did not call them, I went back to submit the request document in person and asked an officer about the email and was briefly told to ignore it. I did not get the chance to see my case officer as She is on sick-leave.
Considering records of same day approval, they must have obtained police check pre test appointments. In reality, I don't know if that's always the case.
I rescheduled and passed my test on 27/June. But during the interview/appointment my CO requested additional documents which I submitted to another officer earlier today (been told my CO is on sick leave). The interesting thing is that I have received another email sent to me on the same day of my test appointment on 27/June. I did ask them today and was told to ignore that. Anyone had similar experience ?