Originally Posted by
cxfan1960
I saw a passenger in a Shanghai Tang PJ on the upper deck before. Perhaps he is a F passenger who wandered up the stairs.

IIRC, there's a post somewhere in the BA forum in which the person says that he wears extra F PJs when he travels in J. Not a bad idea from a practical perspective, I guess. Seems to make a definite "class" statement, however, that I'm not sure everyone would want to make.