Is there a lower safety standard for Xmas tree lights?

[Graham.]

I thought this type of mains operated series chain was no longer legal, but clearly I was wrong. Bought this today.

don't think you could sell (say) a table lamp with a mains lead like that, even if twisted, or joined in a figure-8 lead.

How is it "double insulated" exactly? Does it mean that if I slit the wire insulation, there would be a second layer beneath?

[Tim Watts]

Yes.

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[John Rumm]

Yes ;-)