Warlord of the Air — Michael Moorcock

Set in an unstable world where the British Empire rules over all, this genre-defying novel blends steampunk, alternative history, and time travel science fiction
 
It is 1973, and the stately airships of the Great Powers hold benign sway over a peaceful world. The balance of power is maintained by the British Empire -- a most equitable and just Empire, ruled by the beloved King Edward VIII. A new world order, with peace and prosperity for all under the law. Yet, moved by the politics of envy and perverse utopianism, not all of the Empire's citizens support the marvelous equilibrium.

Flung from the North East Frontier of 1902 into this world of the future, Captain Oswald Bastable is forced to question his most cherished ideals, discovering to his horror that he has become a nomad of the time streams, eternally doomed to travel the wayward currents of a chaotic multiverse.

The first in the Nomad of the Time Streams trilogy, The Warlord of the Air sees Bastable fall in with the anarchists of this imperial society and set in train a course of events more devastating than he could ever have imagined.