It's a lot more than "a handful" of cars that show up............
You can get an idea of the sort of variety of cars present from these reports:
http://themotor.net/?p=9783http://themotor.net/?p=8799There is an official Facebook page, created years ago by the Avenue Drivers Club, who set the event, which no-one seems to update, and so one of my best mates set his own unofficial one up, which you can find here:
https://www.facebook.com/BristolBreakfastClub People start arriving from around 08:30, and stay until 10:30 to 11am (mostly). If the weather is good, then the Square can be full by 09:15 - 09:30, but there's always somewhere to park, as the traffic wardens and police tend not to come along and spoil things.
I plan to be there (it's only 10 - 15 minutes away from home, as I live on the outskirts of the city).