 This was expanded into the Antrim Heavy Regiment early in World War II and shortly afterwards designated 525th (Antrim) Coast Regiment.In 1956 the coast artillery was disbanded, and the Antrim Artillery was converted into Royal Engineers (RE) as 146 (Antrim Artillery) Corps Engineer Regiment, RE.In 1961 the unit merged with 591 (Antrim) Field Squadron, Royal Engineers, to form 74 Engineer Regiment, including 114 (Antrim Artillery) Field Squadron.