I bought some metal wall lights and when I came to fit them, discovered that the fitting instructions state that they are "double insulated", hence no protective earth connection is needed.
There are a 'box-in-a-box' and CE mark logos on the label as would be expected. See photo here:
The brown and blue wires are clearly single insulated and could come into contact with the outer casing.
Is the fitting actually double insulated? If so, I don't understand how.