It is a sans....... Maybe s parva

Thanks, looking at some googled images of s. parva and it sure looks very similar! My plant is literally crawling out of its pot at the moment, although it has not bloomed again since I moved it to a spot with lower light (I confess I'm not a fan of the nightly aroma when in bloom).

I agree with Woodnative. Sure looks like a Parva to me as well.
Stush

It could also be S. dooneri which is a parva look-a-like. Dooneri has wider (1 inch wide) leaves than parva and dooneri leaves are strap-like in shape with no appearance of a center fold or keel. Dooneri leaves are shiny/waxy looking. Parva leaves have a soft subulate tip whose tip curls in on itself like some people who can curl their tongue.

Thanks for the tips michaela - here are a few more closeup photos of the leaves. The "old" leaves don't have the tip curl but most of the other leaves do. A couple of the leaves with the curl:

Older leaf:

dawn v

I have to bow to Woodnative and Stush. Its looking more and more like parva. I can even see a bit of a fold on some leaves. I think parva is by far the more common of the two species. Good pictures :-)