I stumbled across some drawings of the major surface combatants somewhere on the internet when I was revising for my AIB. I copied and pasted them (and corrected them - the type 42 had VLSW in front of the sea dart lol) and labelled all of the relevant parts. He had done other drawings too, but they were so wrong they were beyond repair (or at least, the corrections would have taken more than a couple of minutes). The only thing I'd perhaps leave out is the STWS (ship's torpedo weapon system) on the aft of the Type 42. They don't have them anymore. Hope they help!