35 Heavy batteries of the Royal Artillery

The 1st Hampshire Artillery Volunteers and its successors were part-time coast defence units of the British Army from 1860 to 1967. Although the units saw no action, they protected the Portsmouth area in both World Wars and supplied trained gunners to siege batteries engaged on the Western Front during World War I. The unit continued in the Territorial Army after World War II.

The 2nd Devonshire Artillery Volunteers was a unit of the British Volunteer Force and Territorial Army. The unit and its successors defended Plymouth Dockyard and the Devon coast from 1861 to 1961.

The Sussex Royal Garrison Artillery and its successors were part-time coast defence units of the British Army from 1910 to 1932. Although the unit saw no active service, it supplied trained gunners to siege batteries engaged on the Western Front during World War I.

The Forth Royal Garrison Artillery and its successors were Scottish part-time coast defence units of the British Army from 1908 to 1956. Although they saw no active service, they supplied trained gunners to siege batteries engaged on the Western Front during World War I.

The 2nd Devonshire Artillery Volunteers was a unit of the British Volunteer Force and Territorial Army. The unit and its successors defended Plymouth Dockyard and the Devon coast from 1861 to 1961.

The 1st Cornwall Artillery Volunteers were formed in 1860 as a response to a French invasion threat. They served as a Coast Artillery unit during both World Wars, and also manned batteries serving overseas. The unit continued in existence until the dissolution of Coast Artillery in the UK in 1956.

The 1st Suffolk & Harwich Volunteer Artillery, later the Essex & Suffolk Royal Garrison Artillery was an auxiliary coastal artillery unit of the British Army first raised in 1899. It defended the ports and naval bases around the estuaries of the Rivers Orwell and Stour. Although the unit saw no active service, it supplied trained gunners to siege batteries engaged on the Western Front during World War I. It was greatly expanded in World War II to defend the invasion-threatened East Anglian Coast from Harwich to Great Yarmouth. Postwar it continued in the coast and air defence roles until it disappeared in a series of amalgamations from the 1950s.

The Thames and Medway Coast Artillery, which at its peak comprised three full regiments, was formed in Britain's Territorial Army in 1932 to man coastal defence guns on both banks of the Thames Estuary. It served in this role during World War II, at the end of which it sent troops to work in the rear areas in Europe. It was reformed postwar but was broken up when the coast artillery branch was abolished in 1956.

The Clyde Royal Garrison Artillery and its successors were Scottish part-time coast defence units of the British Army from 1910 to 1967. Although they unit saw no active service, they supplied trained gunners to siege batteries engaged on the Western Front during World War I.

The North Scottish Royal Garrison Artillery and its successors were Scottish part-time coast defence units of the British Army from 1908 to 1961. Although the unit saw no active service, it supplied trained gunners to siege batteries engaged on the Western Front during World War I.

The Thames and Medway Coast Artillery, which at its peak comprised three full regiments, was formed in Britain's Territorial Army in 1932 to man coastal defence guns on both banks of the Thames Estuary. It served in this role during World War II, at the end of which it sent troops to work in the rear areas in Europe. It was reformed postwar but was broken up when the coast artillery branch was abolished in 1956.

The 1st Suffolk & Harwich Volunteer Artillery, later the Essex & Suffolk Royal Garrison Artillery was an auxiliary coastal artillery unit of the British Army first raised in 1899. It defended the ports and naval bases around the estuaries of the Rivers Orwell and Stour. Although the unit saw no active service, it supplied trained gunners to siege batteries engaged on the Western Front during World War I. It was greatly expanded in World War II to defend the invasion-threatened East Anglian Coast from Harwich to Great Yarmouth. Postwar it continued in the coast and air defence roles until it disappeared in a series of amalgamations from the 1950s.

The 1st Lancashire Artillery Volunteers, popularly known as 'Brown's Corps', was an auxiliary unit of the British Army raised in Liverpool in 1859. As the Lancashire & Cheshire Royal Garrison Artillery in the Territorial Force it was responsible for defending the Mersey Estuary and the coastline of North West England. It was one of the few coast defence units to fire a shot during World War I but also provided personnel for a number of siege batteries that saw action on the Western Front. It continued in the coast defence role during World War II, at the end of which it sent troops to work in the rear areas in Europe. It was reformed postwar but was broken up when the coast artillery branch was abolished in 1956.

The 1st Dorsetshire Artillery Volunteers and its successors were part-time coast defence units of the British Army from 1859 to 1956. Although these units saw no action, they protected the Dorset Coast, including the naval base of Portland Harbour, in both World Wars and also supplied trained gunners to siege batteries engaged on the Western Front during World War I. The unit continued in the Territorial Army after World War II.

The 2nd Glamorganshire Artillery Volunteers was a part-time unit of the British Army that defended the coast of South Wales from 1890 to 1942. Although it never saw action in its coastal defence role, it formed several siege batteries of heavy howitzers for service on the Western Front and Italian Front in World War I.

The East Riding Royal Garrison Artillery (ERRGA) was a part-time unit of Britain's Royal Artillery based at Hull in the East Riding of Yorkshire. It provided coastal defence artillery along the Humber Estuary from 1908 to 1956, manned siege batteries on the Western Front during World War I at the Somme and Ypres and played a role in the pursuit of the German army during the Hundred Days Offensive. It served as infantry in Allied-occupied Germany after World War II. Its successor units in the Territorial Army included anti-aircraft artillery and field engineers.

The Pembroke Royal Garrison Artillery was a part-time unit of the British Army that defended the coast of West Wales during both world wars. Although it never saw action in its coastal defence role, it manned a number of siege batteries of heavy howitzers for service on the Western Front and Italian Front in World War I.

The 1st Dorsetshire Artillery Volunteers and its successors were part-time coast defence units of the British Army from 1859 to 1956. Although these units saw no action, they protected the Dorset Coast, including the naval base of Portland Harbour, in both World Wars and also supplied trained gunners to siege batteries engaged on the Western Front during World War I. The unit continued in the Territorial Army after World War II.

The Orkney Heavy Regiment was a Territorial Army unit of Britain's Royal Artillery raised in the Orkney Islands just before World War II. During the war it was greatly expanded to defend the vital naval base of Scapa Flow. It was reformed postwar and later became an air defence battery.

The Thames and Medway Coast Artillery, which at its peak comprised three full regiments, was formed in Britain's Territorial Army in 1932 to man coastal defence guns on both banks of the Thames Estuary. It served in this role during World War II, at the end of which it sent troops to work in the rear areas in Europe. It was reformed postwar but was broken up when the coast artillery branch was abolished in 1956.

The 2nd Devonshire Artillery Volunteers was a unit of the British Volunteer Force and Territorial Army. The unit and its successors defended Plymouth Dockyard and the Devon coast from 1861 to 1961.