 In 1950, 500 and 558 HAA Regiments merged, as 558 HAA Rgt at Coatdyke, and 518 LAA Rgt merged with 591st (Cameronians) (Mixed) LAA/Searchlight Rgt (formerly 125 LAA Rgt, originally 5/8th Bn, The Cameronians (Scottish Rifles)).AA Command was abolished on 10 March 1955, when 558 HAA was disbanded and the other regiments of 68 AA Bde underwent mergers.A few weeks later, HQ 68 AA Bde itself was converted into HQ 1st Army Group Royal Artillery (Field).