Interesting shape for this species. The lip shape does not seem typical for vandarum (and seems to lack the curved spur), in comparison to pics on the net, but the overall proportion of the petals looks a bit like teres. The leaves on your plant look more stiff too, not floppy like vandarum. Maybe yours is the hybrid (vandarum x teres), as seen in this pic:

https://c1.staticflickr.com/9/8513/8...c83e1ac0_b.jpg