Nosing is new to me too, but when I googled pyramid nosing it also showed one which is angled to go over the nose of a stair, which then made sense. As for the forum coming up trumps yet again, it really shows what a great community it is.
I love this thread, so please, when the Thorny is finished, have a break and start on the next one. Good luck with your quest to get to Brighton.
Steve.