I get the impression that some of the flower is missing. Maybe chewed. If the missing bit was mauve or purple, a big guess would be Vanda tessellata.

arthurm
I checked out your suggestion, and I see what you mean. If there had been a lip of that colour, I would have noticed. This is the only other image of the inflorescenceI have and there doesn't appear to be a different coloured lip on any of the flowers.
Not to worry, though. I will just live with a possible ID of Vanda spp or cv.

Have a good one

Fof