According to the David Austin Site:

Pretty peachy pink buds open to reveal beautiful, pure white blooms, with an attractive hint of pink at the earliest stage of flowering. The blooms are chalice-shaped; the incurved petals creating an arresting interplay of light and shadow. Over time, the blooms open a little wider, just enough to catch a glimpse of the pretty stamens within. They flower over an exceptionally long season, maintain their shape during wet weather. A lovely Old Rose and almond blossom fragrance with hints of cucumber and lemon zest. ‘Desdemona’ forms a very healthy and most attractive neat, rounded, bushy shrub. It is perfect for growing in a pure rose border or for combining with other shrubs and perennials in a mixed border.

I assume the name comes from the character in William Shakespeare’s play Othello

Taken with a Sony A77II and Minolta Maxxum AF 50mm f2.8 Macro.