A couple of miscellaneous items I snapped in the last few days.
This is the type of junction box most often used with our equivalent of NM cable:
3-terminal (pictured) & 4-terminal are the most common, the latter being usual for lighting circuits (line, neutral, ground, plus switch return).
Here is one of our "cooker control units." It combines an isolation switch for the electric range and a normal 13A receptacle. This one is a typical 1960s unit. It is also a rare example of a domestic fitting with separate device and cover plate (most switches & recepts are all-in-one):
In the last pic you can see the shutter mechanism over the line & neutral of the socket. The shutter is pushed down by the ground pin when a plug is inserted.