103rd (Lancashire Artillery Volunteers) Regiment Royal Artillery is part of the Army Reserve and primarily has sub-units throughout the Greater Manchester and Merseyside area of the North-West of England, in recent years it has extended its footprint to Wolverhampton, Isle of Man, Carlisle and Nottingham.

However, in Manchester, numerous units that would later form the Lancashire Artillery Gunners had existed from as early as 1804, when the Duke of Gloucester inspected the Heaton Artillery Volunteers before they were shipped off to the fronts of the Napoleonic Wars.

[3] Officers and men of the Lancashire Artillery Volunteers continued to give service during the two world wars of the 20th Century.

[5] In 1969 213 (South Lancashire Artillery) Light Air Defence Battery was formed at St Helens and joined the regiment.

[5] 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.