It might help to know if the rose is an older or newer variety, if it tends to bloom singly or in clusters and what the leaves and thorns look like.

Very pretty, by the way!

Thanks for your interest Petaloid, the rose blooms in clusters - none on it at the moment, but you can see the spent blooms. It might be a newer variety. See also pics of the leaves and the thorns.

Thanks
Grant

And the thorns

I posted a link on the Rose Gallery forum to your excellent photos.

Let's hope that you get an answer quickly.

Here is a link that might be useful: Rose Gallery forum

Thanks Petaloid

It looks a lot like my "Distant Drums" in bloom. Do the blooms change color as they age? My "Distant Drums" starts in a buttery yellow with the purple rim, but the blossom turns to a pale lavender as it ages.

http://www.heirloomroses.com/roses/unusual-color-roses/distant-drums.html
http://www.helpmefind.com/gardening/l.php?l=2.1538
http://www.thegracefulgardener.com/wp-content/uploads/2012/06/2012-03-30_4947_edited-11.jpg

Possibly rainbow sorbet? Do you know where you got yours? The blooms can look so varied from flower to flower but mine has had that shading and the leaves look similar.

Here is a link that might be useful: Rainbow Sorbet

It looks much more like Rainbow Sorbet than Distant Drums to me. DD is a mauve color not that pretty yellow and pink blend.

May be Strike It Rich, a grandiflora. While my pic is a single bloom, it frequently blooms in clusters.