This is painted in egg tempera on watercolour paper. I have based it, on another of Aidan Hart's icons of early British saints. He has done a series of similar ones to this, but I don't know if this is his own prototype or if he drew inspiration from another source. Regardless, I love his work and very often look to his corpus first when considering how to approach a subject.
This is in my icon corner at home and I noticed this morning that his right eyelid, the left as you look at it, is drooping slightly. I'll have to modify it.
This is one of the drawbacks of painting for you own prayer, you can be distracted by your own errors! Here is Aidan's: