Halnaker Chalk Pit

Halnaker Chalk Pit is a 6.4 ha biological Site of Special Scientific Interest north-east of Boxgrove in West Sussex.

This chalk pit is important as it has about 50% of the British population of a nationally rare and vulnerable plant, broad-leaved cudweed. Other plants include hoary plantain, scarlet pimpernel, bent grass, yellow-wort and autumn gentian.

The site is private land with no public access.