The 4th Battalion, Parachute Regiment, is an Army Reserve unit of the British Army. Now recruiting across the United Kingdom originally the Battalion covered the North of England, with its headquarters located in Pudsey, West Yorkshire. Following the Options for Change review in 1993, 4 PARA amalgamated with the 15th (Scottish) Battalion of the Parachute Regiment, which was downsized and became 15 (Scottish) Company of 4 PARA. As part of further changes in 1999, the Battalion also merged with the 10th (Volunteer) Battalion which then became 10 (London) Company.

The Army Reserve is the active-duty volunteer reserve force of the British Army. It is separate from the Regular Reserve whose members are ex-Regular personnel who retain a statutory liability for service. The Army Reserve was known as the Territorial Force from 1908 to 1921, the Territorial Army (TA) from 1921 to 1967, the Territorial and Army Volunteer Reserve (TAVR) from 1967 to 1979, and again the Territorial Army (TA) from 1979 to 2014.