It's just that it fails to move. Open all the windows, turn on the fans, and nothing happens. Downstairs, open windows, a magic breeze. The Asbestos Palace had a well-insulated attic, cavity wall, insulation, double-glazing etc. There's an actual thermocline as you ascend the stairs.
That said, it was still north of 26 degrees downstairs this morning. I did wake up expecting to be face-to-face with one of the garden foxes as I left the patio door open all night.
Currently heading towards 30 degrees in the Remote Command Centre. I am so glad I paid more for the insulated ceiling...