How allied orders can create a default frigate design

How would a large British and Indian Type 41 program affect the number of Type 61 frigates built?

It could increase follow-on demand by lowering costs and creating a common allied support and upgrade base.

A combined order for seventeen British and eleven Indian Type 41 frigates would establish a baseline of twenty-eight ships. The resulting Type 61 order would depend partly on how much that programme reduced costs. A common design can attract further allied buyers once it becomes a practical default, as illustrated by the Leander and Oliver Hazard Perry classes. Partners can then share development, upgrades, maintenance, parts production and support throughout the ships' lives.