Is this Tritonia?

Is this Tritonia?
My lovely cousin from Cornwell asked me the other day if I knew what a plant was in her garden. Looking at the photos she sent me, Sue and I thought it could be Tritonia. 
They grow from very small bulbs and we have a few in our garden here. We have three colours as in the photo. The pinks are now on the turn. 
Lovely delicate flowers on very long shoots with a few leaves around the base. 
We are still not sure as such so todays photo diary entry comes as a question to all of you to.
Is it Tritonia and if not what is it :)