Naming the Type 42 and Type 22 combination

What was the Type 42 and Type 22 air-defence combination called?

The name recalled is a 42/22 combination; widespread service use of the informal Type 64 label is disputed.

The pairing is recalled as a 42/22 combination after an initial mix-up over the frigate type. Clarke says personnel he spoke with rejected the Type 64 label because the number already belonged to a different part of the Royal Navy's classification scheme. He challenges the idea that repetition in a book establishes widespread service usage. The objection is about how the formation was named, while the underlying short- and long-range air-defence combination remains clear.