要塞砲
After the war, the corps was re-organised so that it retained heavy field artillery and so that its fixed coastal batteries could be called upon to also operate in the field. The fixed coastal batteries were by then a small part of the corps, and the operation of heavy field artillery had been found to be more alike that of the field artillery. Maintaining the RGA as a separate corps consequently became unnecessary. The corps name was discontinued in 1924, when the RGA was re-amalgamated into the Royal Artillery and the RGA ceased to exist as a separate entity. Coastal artillery was also among the victims of post-war cutbacks of the defence budget. In 1926, it was decided that fixed coastal batteries in the United Kingdom-proper would be manned entirely by Territorial Army Royal Artillery (with small District Establishments of Regular Army Royal Artillery as Permanent Staffs). At the same time, the Regular Army Royal Engineers "Fortress Companies" handed responsibility for the operation of the Defence Electric Lights (used to aid night firing at coastal batteries) to Territorial Royal Engineers units. This was generally the case in British colonies, also (the Regular Army Royal Artillery and Royal Engineers companies were withdrawn from Sierra Leone and the Bermuda Garrison in 1928, and in the same year the Bermuda Militia Artillery was re-organised on Territorial Army lines to in order to take over complete responsibility (with the District Establishment) for manning coastal artillery. The Bermuda Volunteer Engineers was raised in 1931 to take over the Defence Electric Lights). In the Far East, the growing threat of the Imperial Japanese Navy and Japan's military adventures in China meant that coastal artillery defences were increased, notably at Singapore where the Singapore Naval Base was constructed, and Regular Army coastal artillery units remained.