The missing rock was also known as Lots Wife.
There is a lighthouse at the end of the chalk formation near sea level, built in 1859.
The first lighthouse on the Needles headland was built in 1786.
A new lighthouse was hence built on the outermost Needles stack, close to the sea.
This lighthouse is 31 meters tall and its light is located 24 meters above the sea level.
The lighthouse was manned by three men until 1994 when it became fully automated.
The helipad on the top was added in 1987.
The battery was eventually decommissioned in 1954.
The site is now owned by the National Trust, and is open to the public.
Sources:Wikipedia/Trinity House/National Trust/H2G2.com