Bouquets:

Bride
Maid (Matron) of Honour
Bridesmaids
Flower girls
Bride's Toss Bouquet

Hair Ornaments:

Bride
Maid (Matron) of Honour
Bridesmaids
Flower girls
Junior Bridesmaids

Buttonholes:

Groom
Best Man
Usher
Father of bride
Father of Groom

Mothers:

Corsage (lapel or wrist)
Purse/Handbag decoration flowers
Arm Bouquet

Ceremony:

Altar
Pews
Main Entrance

Reception:

Centrepieces
Head table
Staircase railing
Buffet Tables
Cake Table
Place-card table
Wedding Cake

With thanks to WeddingFlorist UK, for this article.

WeddingFlorist UK is a collection of florists who offer a wedding flowers service
AND who also maintain a web presence. Once you have located a florist in your
area you can then visit their web site and see if they are the right florist for you.