Cant say as I noticed that Sam.
The windows are quite small compared to wide body jets and as we were over the water when we reached mach 2 and 63,000 feet there wasnt much to look at
The only thing that made us aware that we were going fast was the machmeter on the wall at the front of the cabin, no real sensation of speed apart from the initial take off acceleration then the next surge of acceleration as the after burners were fired up to take us supersonic.
No sonic boom as presumably we were going too fast to hear the one that we must have made
There was however quite a lot of "wind" noise, as you get when going fast in a car, which surprised me,
Apparently Concorde grows by 8 inches at supersonic speed, due to the heat of the friction causing it to expand.
I had a very nice steak served with a bottle of Pauillac which went down very well after the initial glasses of champagne served to us in the VIP lounge at Manchester airport and during the flight before the meal