In researching this orchid I have discovered that it is also called the Lemon Orchid, Rabbit-ears or Rabbit’s Ears Orchid. Looking at the photo on the guide, I can see that the dark marks in the centre do look like some flopsy ears. These aren’t shown in my photos, so I will go back out there tomorrow and try to capture them.
The flowers are approximately 15 – 20 mm across, and on stems around 15 cm long. Ours are a very pale lemon colour, almost a rich cream colour, which is why I have chosen to call them Vanilla Orchids rather than Lemon Orchids.