[emeritus]

I saw that programme to, and didn't mention it to my wife, who gets annoyed when I point out this sort of thing! AFAIR it was a 3A fuse that was blown, consistent with the early 13A system that I understand from old books and a MK 13A plug that has a 3-position flag showing fuse type, originally had only 3A, 7A , and 13A fuses. Most 1940's domestic wiring would surely have been fused at only 5A, 15A, or 30A using a wired ceramic fuse carrier. I would think that a sysyem designed in the early 1940's would not have been found in a domestic dwellng during the war: I doubt that many new houses for private dwellings were built then, and I would think that supplies of electricity cables etc. would have been reserved for government use.