English Heritage.
The tower is now surrounded by housing, but was earlier attached to a farm. Connected parts of the building originally formed the manor’s Great Chamber etc but English Heritage only own the tower, the remainder now being a private residence. The main chamber contains some extremely rare medieval wall paintings, uncovered in the 20th century. The upper chamber can also be visited. Visits are currently by booked guided tour only.
The wall paintings are of considerable interest, but parts are much damaged and one needs the guided tour for interpretation.
Visitor parking is in Woburn Close about 100 yards away. Note that there is no waiting area inside the building so visitors should arrive on time and wait at the foot of the stairs to be admitted. There is no convenient waiting area outside either, other than the access lane. The postcode covers a large area, so drivers should set their satnav for Woburn Close.