"Dave Plowman (News)" wrote in
:

Eh? Even with final circuit rings there were at least three types of
sockets. Normal, D&S (round pins where the live was a removable fuse)
and
Walsall gauge. Same as 13 amp but the pins at 90 degrees. The last two
often used by councils on housing estates. Gawd knows why. Some
official
with a bee in his bonnet. Or saving pennies.

Then plenty of the old types still in use. 3,5 and 15 amp round pin.
In
both 2 and three pin. Then there were some oddities with flat pins.


I know of these:

Special plugs for computers servers and other IT gear. They have a T
shaped earth pin.

I think it is some variation of BS546 used for theatrical lighting.

Then there is all varieties of CEEKon fittings.

US visitors used to laugh at our variety of sockets, domestically. Now
we
have only one, and they have the variety.

Not really. Domestically, for GP recepticals, there is only the the one
basic standard with a few minor variation, all backwards compatible to
the parallel blade two prong plug.