35 years on and I still get sweaty hands thinking about it!
My recollection is that I'd decided, before I got there, to do approaches and landings from far enough out for me to configure 'from scratch', so what would that be, 10,000agl? Must have been something of that order, because I only had two attempts, and it wasn't over in less than half an hour. The reason was exactly the same as this thread's subject - could I do it for real?
I was on the left with a Training Captain telling me where and when for flap, brake, gear, throttles etc. I think that we must assume that they didn't give me any wind or other weather effects.