Dawn, Midday, and Dusk

[SmartWombat]

Vickers Vimy
Battle of Britain memorial flight
Avro Vulcan

Three bombers the only flying examples.
Though the Vimy is a replica, built to re-make the transatlantic flight and then on to Australia.
The Lancaster is the only flying airframe in the UK. I think one in Canada flew this year.
The Vulcan is the last and only flying example.

All this progress from 1919 to 1942 to 1953.