Martello Tower 66

Martello tower number 66 was constructed in 1805-6 and was built to augment the firepower of the six-gun shore battery known as East Langney Fort or Langney Redoubt, built in 1795. It is located just to the north of Langney Point, Eastbourne. Over the years it has been subject to several modifications, such as the addition of a concrete roof for a gun emplacement during the Second World War. This structure is still extant, and in turn supports a temporary structure which is part of its current use as a coastguard station.  The tower is both a Listed Building and a Scheduled Monument.

http://www.pastscape.org.uk/hob.aspx?hob_id=411918

The Pepper Pot

The Pepper Pot is a neoclassical designed tower built in 1830 by Charles Barry, in the grounds of a now demolished villa near Queen's Park , Brighton.
Intriguingly its original purpose is unknown. A recent research suggests that the tower stood above a well and housed a steam engine which drew the water out.
The building, 20m tall, has been used to print and pubblish the local newspaper   "The Brighton Daily Mail" , as an observation post by the Army during World War II , headquarter of a Scout troop, artist's studio and even as a public toilet in the 60s.