What is the smallest viable ocean escort for the Royal Navy?
Short answerA modified River-class design is a better candidate than the much larger Type 31 for the smallest practical ocean escort.
NotesThe Type 31 is not a minimal ocean escort because it is nearly as large as the Type 26. A genuinely smaller design would start closer to a modified River-class hull. That ship would accept fewer capabilities in exchange for a lower-end ocean escort. Presence frigates and bare-minimum escorts occupy different places in the force structure.