Flower growing in a clump at end of my garden

Observation - Flower growing in a clump at end of my garden. Description: A long stalk flower with small white flowers at end of stem. Growing in a tight clump of the same flowers at the top of my garden. One was picked and stuck between slabs so as photo could be taken.

A long stalk flower with small white flowers at end of stem. Growing in a tight clump of the same flowers at the top of my garden.
One was picked and stuck between slabs so as photo could be taken.