A British war-emergency River-class escort

How should Britain arm a River-class war-emergency build to cover delayed Type 26 and Type 31 frigates?

Fit Sea Ceptor, a 57- or 76-mm gun, a 40-mm gun, ASW torpedoes, and aviation space for UAVs or a small helicopter.

The River class is the available hull that could be accelerated in an emergency. A more combat-capable fit would add Sea Ceptor, a 57- or 76-mm gun, a 40-mm weapon, anti-submarine torpedoes, and an extendable hangar. The concept prioritizes equipment that can be integrated without waiting for an entirely new design.