World War II era naval timeline by Astrodragon. The first thread, now archived, is available here and the timeline currently continues in its second thread, here.
The Royal Navy regains control of the Fleet Air Arm from the Royal Air Force earlier than in OTL. This leads to greater support for the FAA, including more advanced carrier aircraft. The knock-on effects are followed through the war with some interesting alternative outcomes.
With over 1.81 million views, it stands as the most-read timeline on Alternatehistory.com as of May 2013.
It won the 2013 Turtledove Award in the “Best Continuing World War II Timeline“ category.
In repeated the same success in the same category at the 2014 Turtledove Awards.