He had 1.5 hours of downstairs time. We went early this morning as it's cooler as well.
He was a little wary about the morning noises and people going to and fro.
To his credit he took all the noise in his stride and only ran into his carrier to hide-out twice in the 1.5 hours.
So he just hung around near the staircase and looked at the long corridor upstairs. At least he had some time upstairs.