Hmm, options one and two are definitely out, but I did a search for "fuse" "fuseblock" "fusebox" on my Service Manual (which arrived yesterday, yay), and it refers to fuses, but I couldn't find a legend.
I will delve more deeply into it!
Got a dome light that stays on, an courtesy lights that stay off and I'm told it may be the fuse.
Worst case scenario, I pull each fuse out one by one until I find it.
I'm just surprised there's no legend in The Haynes manual, it's usually really obvious.