Table lamp switch with no earth but metal parts

[nick69]

Hey all,

A mate has got a nice table lamp with a now broken toggle switch. He has asked me about what switch to use to replace it with but I don't know.
The lamp uses 3 core flex as it has a metal body holder for the bulb, the switch (toggle type) doesn't have an earth lug on it but has a metal top. The earth wires are terminated in a choc block from the manufacturer.
If the switch has metal parts shouldn't it be earthed?
Cheers

EDIT: Could you fit a ring terminal to the threaded part of a toggle switch before fitting it? That would earth the switch wouldn't it?

 

[PrenticeBoyofDerry]

The switch is possibly classed as double insulated, therefore would not need an earth attached to it.
Could you upload a picture of switch and any markings/symbols on it?

 

[stillp]

A photo of the table lamp as well as the switch would be useful.