It can be locally quite abundant, but is by no means common. The distinctive shape and colouring of the flower resulting from a process of evolution that encourages certain species of bees and wasps (in habitats in the Mediterranean area) to attempt to mate with the flower  thus aiding the transfer of pollen. In this country it is more usual that self-pollination takes place, the pollen sacs on their long stalks simply swinging in the breeze until they make contact with the stigma beneath.
See also: Spring/Early-summer flowering orchids at Badbury Rings.
The pictures of Bee Orchid in this gallery were captured at medium resolution.