On 12/08/2019 15:01, Dave Plowman (News) wrote:
In article ,
Jim GM4DHJ ... wrote:
just figured out what the two extra holes are just below the earth
terminal of a double 13A socket I bought at a car boot sale ......

Just curious why anyone would buy a socket at a boot sale.

Especially one who rather obviously doesn't know what he's buying.

Quite. There's at least a chance the Toolstation ones have been through
some sort of quality control.