Thanks for the feedback, insn’t 8 Crossley ASR1 diesels a bit of an overkill for a vessel this size?

HMS Mermaid was indeed based on the Type 41/Type 61 [Leopard/Salisbury] hull but externally, does she actually share any similarities? Looking at the photo on the left below and comparing it with the HMS Mermaid photo above, the hulls look very different.

In the pic on the right below is a frigate that Yarrow customed designed for the Royal Malaysian Navy in the 1970’s, does she bear a resemblance to any Royal Navy frigate design from that period?

Also [apologies for the numerous] questions :] : which was the first navy to introduce a vessel with a CODAG arrangement?