Interflora

It's not frequently we can say this about a merchant, but if you need to know more on the subject of Interflora then give them a try on Wikipedia! They're that big and they've been around that long (first started in 1920!)

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

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