Uk Florists

I want to buy my girlfriend a white single rose flower, but all that I have been to only sell bouquets of flowers or single red roses. Anyone have any ideas where I could get a white rose? I am in the United Kingdom.

Often times grocery stores and discount variety type stores also have a small section of flowers. I think it is strange that you can not get a red rose as one, I would try other shops and florists in your area.