A wartime Napier Deltic production line

What impact would an early full-output Napier Deltic factory have on World War II?

Deltics could power corvettes, sloops, minesweepers, railway engines, generators, and auxiliary systems, improving range and distributing a capable diesel across many wartime needs.

The engine's greatest impact would come from use across escort propulsion, auxiliary power, infrastructure, and land transport, where a mature factory could relieve several equipment bottlenecks at once.