There are perhaps around 5,500 moated sites in Britain, of which no more than 30 still contain water and only a handful have a double moat like the one at Birtsmorton in West Midlands. The moat and other waters are full of fish, a reminder of the days when they once supplied the larder of the house.
The moat is filled from the streams of the Malvern Hills via a large collecting pond to the west of the house, known as the Westminster pool. Tradition has it that the Pool has the same dimensions as the nave of Westminster Abbey and was dug in the same year of its consecration, which would date it to 1269 or earlier.
The second moat lies to the east of the house, and was dug to create a safe night-time sanctuary for livestock, protecting it from attack by wild boar. A stone boar now sits defiantly in the center of the space The clay sub-soil is critical to maintaining the flow of water, which is also supported by a series of sluice gates.