Custom-built S&S 1999 Frezoni - PBP and LEL + lots
Modified 1965 Moulton Stowaway - 2-speed PBP and fixed-wheel Super Randonneur
Borrowed 1980s Apollo 4 - 1000km brevet
1999 T5 Brompton - Dunwich Dynamo, about 200km
Borrowed SA8-hub Moulton Series 2 - 300km brevet
Very early Cannondale tandem - centuries
1980s Alan - 1000km brevet + lots
Early steel-fork Cannondale - SR
Cannondale 2.8 - SR + lots
1980s Hoffy - centuries
Early 1980s Apollo 3 - centuries
Borrowed replica penny farthing - 100km race (felt longer)
I think that's about it (you didn't say they had to be my own bikes).