A better picture would help, can hardly see it in this one.

Could be Candide or Versicolour, Davey. In my RHS book it says either of these are white, turning peach or pink. They're very beautiful. Do you have it in a greenhouse?
Annie (Cumbria)

Yes Annie indeed it is Candide Alba & it is in my greenhouse, I have some young cuttings I hope will take.
I grew a few different varieties last year but none made it through last winter