In article , David Looser
writes

BTW did anyone here ever come across the alternative design for a UK fused
plug? I only met one once, it had round pins and looked fairly similar to
the old 15A plug, but the live pin *was* the fuse.

'Waco' or 'Wago' plug, I think. The problem was that the live pin-cum-
fuse tended to unscrew from the plug body and stay in the socket when
the plug was pulled. Not exactly safe...

The fuse had a threaded
stud on one end and simply screwed into the face of the plug to form the
live pin.

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