Burberry worker union skirt labels help

[Popori77]

Hello.
I have a vintage wool midi skirt with union workers label on inside and burberry paper tag in a plastic tag.
The burberry tag seems to describe wool skirt with a correct sizing but the skirt doesn't have any burberry labels on inside.
I know WU did make clothing for Burberry but were there instances where burberry label was not printed on inside of the garment?

Thanks in advance.

 

[Popori77]

Wonder if someone just put burberry paper tag in, or is it possible there is more to it.
Any ideas welcome.