There is an image of this cultivar on the Hosta Library. From the photo on the HL website, it appears to be a small size hosta with green leaves and pale purple flowers. It is a hybrid of H. pycnophylla. This non-registered cultivar was originated by Lady Anne Palmer of England in 1995. 

Rosemoor was the home to Lady Anne Palmer and her mother following the death of her father, Robert Horace Walpole, the fifth and last Earl of Orford, in 1931. It is now a garden of the Royal Horticultural Society. She grew this hosta from seeds that came from a U.S. source.