What eight Midway-class carriers would change in 1939

What changes if every Royal Navy carrier in October 1939 becomes a Midway-class carrier?

Britain gains an enormous multi-carrier capability, but supplying enough suitable aircraft becomes the central constraint.

The Midway class was not the exact ship the Royal Navy would have designed, yet its armor and size made it far more compatible with British needs than an Essex. Eight such ships would enable powerful multi-carrier operations and could radically enlarge strikes such as Taranto. Air-group availability would become the new bottleneck, possibly forcing earlier British aircraft orders from the United States.