Churchill's political position becomes contingent

Would Winston Churchill still have a government job in 1920 if the war were delayed?

Probably, though a Conservative government could instead leave him in opposition.

The counterfactual does not assign Churchill the guaranteed wartime path familiar from actual history. His position in 1920 depends on whether the Liberals remain in government; a Conservative victory could leave him outside ministerial office. The brief answer is a useful warning that changing the war also changes the political careers surrounding naval policy.