Standard frigate hulls across allied fleets

Could allied frigate programs converge on common, scalable hulls with different weapon fits?

Yes; a sound standard hull can support multiple national variants, as the Iver Huitfeldt and Type 26 families demonstrate.

A standard hull can be scaled and fitted for different national roles. The Dutch-Belgian replacement programme and possible German participation show how allied procurement might converge without imposing an identical combat-system fit. The Absalon and Iver Huitfeldt lineage behind the Type 31 offers one example of a successful hull supporting successive variants. The Type 26 family offered three hull sizes, yet Canada and Australia selected the smallest and Britain chose the middle option. Each could make a case for the largest hull because adaptable volume and growth margin matter over a long service life.