Hiya Bryn
Yep you're right about Kingfisher - it is also a Dartington colour, I sold a Dartington Kingfisher Nipple Vase not that long ago. Although, it is quite a different shade from the Whitefriars Kingfisher, which is darker and deeper in tone, the Dartington Kingfisher is much paler by comparison. Thanks for posting the update on this vase - very useful info.