Weirdly i had a missed call and didnt recognise the number , but rang it to see who it was , and it was the assessment centre and they said
"Do you have an assessment booked in for tomorrow and i said yes and she said would i still be available and that it would take up to an hour and that if it was okay could they ring me up a few days later for some feedback" ?
It happened to me for the same thing. It was really a call to make sure I would be available for the telephone assessment I had today, and to make sure I remembered it.
To be honest, I was glad they called as I knew very well the appt was happening but I often do forget and miss other appts. I would imagine the review comment was more of an aside.