Hi Alan,there is a "hibrid" variety, I have been reliably informed; which bears clusters of creamy white flowers.It is called "Clotted Cream".I was given one in the Spring and it was slow to take off(maybe the cold spring) But it put on rapid growth when the warm weather arrived and started flowering in mid June and is still flowering. It is a mature plant, approximately, 5' high when I aquired it. I have it growing in a large pot and it is clambering up the pergola, which faces northwest.And yes, it is more fragrant than the pure white one, especially on warm humid days. There is a question mark over its hardiness as it looks slightly delicate compared to the hardy Officinale and its leaves are paler too. You could try growing it in a sheltered location or up close to the house.
By the way, I am unable to use the spell check,does anyone else have the same problem or can some one help me please?