Yes. The supply to the lantern is made up of:
Switched live: from switch
Earth: from switch
Neutral: from ceiling rose via switch (but not connected to switch)
I think I am following you perfectly now, the neutral goes from rose to lantern, then
so in effect, switched live from switch to lantern
Earth from switch to lantern
Neutral from rose to lantern.
that is so much easier to understand, thank you very much for your time and help, defo appreciated