I cant but look at Taylors clematis website. you may find a match there.

It looks very similar to the one I have - Miss Bateman.

It may be Guernsey Cream if it has a green stripe on the back of the petals and it has a slight scent. Miss bateman has a ring of pinky purple stamens. My Guernsey cream is young but has flowered well this year in shade against a north facing wall.

Oh, I bought my clematis labelled as Miss Bateman but it doesn't have purple stamens. It must have been wrongly labelled then.