The old classifications had V. albigularis in a few different subspecies breakdowns (V.a. angolensis, V.a. microstictus or V.a.ionidesi and V.a.a. etc). This was because they were thought to occupy specific ranges and habitats distinctly and have physical differences more than patterns on their backs and faces and 'worthy' of being named subspecies. Even in Varanoid Lizards of the World 2004 the author is suspect of subspecies saying "There are three suggested subspecies..." Newer current research says that each type can be found in various places and they do NOT follow a locality map as once thought. They now call all of them simplyV. albigularis, but trade names or common names still say things like "cape banded whitethroat, blackthroat, ionidesi etc etc..." to describe the back patterns and face markings better. While I agree that there are clearly 2 forms out there, they apparently are here and there and don't follow any distinct population.
7'2" Shaquille O'Neil and 4'2" Tattoo from Fantasy Island may superficially look like different species to an alien but they are both Homo sapiens in reality. 
http://www.maggiemaggie.com/files/page0_blog_entry6_1.jpg
http://cm1.theinsider.com/media/0/30/24/splashnews_nrfl240307d_03.0.0.0x0.333x500.jpeg
Do you have a link or something to this "new WT subspecies"?