ID please. Unknown Anthurium

I have had this Anthurium for several years and have been searching google for about that long, does anyone know what the real name for this plant is???
It has very large leaves, up to 80cm long and 40cm wide. Plain mid green with distinctive veins. It has quite long petioles, up to 20cm long. All the bird's nest Anthuriums look similar but this one seems to have much longer petioles than others.
The flower is black/maroon with a black/maroon spadix. The flower gets up to 15-20cm long. It doesn't smell.
I would be very grateful if someone knows it's name.

I went out and took more photo's of the Anthurium in question. Hope this helps.

Another image. The span of leaves must be about 2m.

If you were a subscriber you would be able to access the Aroid forum http://davesgarden.com/community/forums/f/aroids/all/ ...one of the experts there should be able to help.Otherwise try the Plant and Tree identification forum. http://davesgarden.com/community/forums/f/plantid/all/. which is available to all.