A few very large speaker are dotted around Hood;s superstructure (Tannoy system?). These speakers were added late in Hood’s career and do not show up in most photographs. The one at the breakwater is the most prominent but others were more difficult to spot. I managed to find one near the conning tower and one attached to the fwd bulkhead near the second funnel.  One pair appears to be fixed to the aft searchlight platform below the two upper searchlights? Update 10/2022: spotted another one on the barbette on X-turret, image updated. A small selection of speakers was built using rod, an etched part, and finished using Magic Sculpt.