Approx 10 years ago I purchased a 13A plug which had a large neon indicator
in the back cover (cannot remember the maker), it was quite useful to know
if something had been inadvertently left on, or if a fuse had blown on
something you needed to be on.
Having done a search I can no longer find one, except for a switched plug
with a tiny neon which is so small it does not readily impact on the eye.

Anybody know of a supplier of a plug with neon?

Don