[1] During World War II the mansion became a naval training base for coding and signals, under the name of HMS Cabbala, and a mast was erected in the high reception hall.

After the war, the buildings constructed for the hospital and, for a time the house itself, became HM Prison Leyhill.

[3] The property was designated a Grade II* listed by English Heritage on 9 July 1991.

Tortworth Court is especially notable for its extensive arboretum developed by the 3rd Earl of Ducie, who began planting upon inheriting the property from his father in 1853 and continued until his death in 1921.

Accessible by a public footpath, it is now divided between the hotel grounds, the grounds of Leyhill Prison, the Dell which is privately owned and managed as a community woodland by Tortworth Forest Centre CIC, and private land still owned and farmed by the Ducie family.