Officers and men of the Lancashire Artillery Volunteers continued to give service during the two world wars of the 20th Century. In 1967, some of these units were amalgamated to form 103rd (Lancashire Artillery Volunteers) Light Air Defence Regiment Royal Artillery (Volunteers). Its units were Headquarters Battery at
Liverpool,
208 (3rd West Lancashire) Light Air Defence Battery at Liverpool and 209 (The Manchester Artillery) Light Air Defence Battery at
Manchester. In 1969
213 (South Lancashire Artillery) Light Air Defence Battery was formed at
St Helens and joined the regiment. In 1976, the regiment changed its designation to 103rd (Lancashire Artillery Volunteers) Air Defence Regiment Royal Artillery (Volunteers) upon being equipped with the
Blowpipe missile air-defense weapon. Then, in 1986, 216 (The Bolton Artillery) Battery was formed at
Bolton and joined the regiment. In 1992, as a result of the
Options for Change, the regiment lost one Air-Defence Battery (213 Air-Defense Battery, which was amalgamated with HQ Battery at St Helens) and Regimental Headquarters were moved from Deysbrooke Barracks, Liverpool, to St. Helens to be co-located with HQ Battery. In 2001, the regiment transferred from Air Defence to the Field Artillery as a Light Gun Regiment. ==Batteries==