RED CAMPION

Note the leaves when you see a plant in flower, then you will recognise the plant before it flowers and know where to expect it.  Red campion overlaps with bluebells and follows on when the bluebells fade.

This species is dioecious, meaning the male and female flowers grow on different plants.  Apparently you can tell which by looking in the centre.  Are the white bit stamens or stigmas? 

 I don't find it that easy.