Nice pics!
We called them Emergency Class Frigates, there was a rumour that their pre-fabricated hull parts had been stockpiled somewhere in the event of war, the original intent had been to operate three for every Type 12 with the Type 12 being the Squadron Leader, but with numbers of ships limited the little ships were taking up billets that could be filled by larger ships with more use in peacetime so the building program was cancelled.
Does anyone know where Duncan ended up? I heard she became a training ship, but the only one I know of was the Russel in Pompey.
BTW, the idea was reborn with the original Type 23 Frigate, that was to have been a small, single purpose ASW hunter which would operate in groups of four with an armed Fort Class RFA, in the event of air attack the Type 23's were to scurry up to mother and hide under her missile protection, which was to have been - vertical launch Seawolf, max range about 5 miles. Sigh. I often wonder what definition I would find under "Naval Planner" in the dictionary.