Interflora

It's not often we can say this about a merchant, but if you need to know more about Interflora then check them out on Wikipedia! They're that big and they've been in business that long (originally started in 1920!)

Essentially they are a florist shop service that delivers throughout the UK and worldwide. They have themed floral displays and presents suitable for birthdays, anniversaries, weddings, birth, and housewarming. Apart from flowers they offer hampers and present sets that can include wine, chocolates, gourmet delicacies and fresh fruit.

As their famous advertising campaign said ... whatever it is, "say it with flowers".