The 7c and 20c stamp are from Flowers definitive issues showing Fly orchid and Thrift.
Fly Orchid (Ophrys insectifera) is a species of orchid and the type species of the genus Ophrys. It is native to Europe and favors sites with alkaline soil. The name arises because it resembles a fly, being totally dependent on flies and bees for pollination. The plants use scent to attract male flies, which pollinate the flowers as they attempt to mate with the flower. The scent released by the flowers mimic female fly sexual pheromones.
Thrift (Armeria maritima) can be found in the wild in coastal areas across the Northern Hemisphere, especially in Europe, but also occurs in parts of South America. It is a common sight in British marshes. It can grow in dry, sandy, saline conditions such as those at beaches and salt marshes.
The 55c stamp is from 2010 Wedding Stamps issue featureing a pair of devoted lovebirds which embody the love and joy shared by the happy couple.