It is a fairly new lab run by well known gemologist Richard Hughes. It specializes in corundum treatments and is generally thought of as a high quality, reputable lab.
It's about a year and a bit old and as Minous pointed out owned and run by the infamous gemologist Richard Hughes who is one of the leading experts on Sapphire, Rubies, Spinels and coloured gemstones. I've seen people advertising stones with certificates from their lab on Ebay recently. I don't think the lab itself is that well known yet because it's fairly new but Richard is very well known in the industry.