When I saw a small yellow Moraea on the plot nearby and wrote about it in my blog ‘An Empty Plot’ I had trouble identifying it and eventually settled on M neglecta, knowing that the latter is normally around 25 cm tall, whereas the one I saw is only 10 cm tall. I therefore misnamed it and it was only when Christine saw the image and recognised the flower that I became aware of M. papilionacea. This then, is what it is and it around 10 years since one was last seen, so I found the plant again this morning and show it in all its glory!
I was also able to get a better photo of the Holothrix at this site and so confirm it as H. villosa var. villosa