that of a Battle class AD conversion capable of carrying out some cruiser presence, patrol and GFS roles. The cramped living conditions of a 4 turret Dido conversion were intolerable for a post war peacetime navy. The radical reviews of the RN in 1953 and 1954 concluded that the risk of a third world war had lessened. The immediate provision of interim AA cruiser conversions and the upgrade of the Type 41, Type 61 and Type 12 frigates then under construction with 3-inch automatic guns and L70, 40mm instead of 4.5-inch guns was cancelled in Feb 1955. To reduce the cost of the ambitious Korean conflict rearmament programme approved in 1950 and reallocate the approved 25, 3/70 AA turrets to the Tiger gun cruisers approved in Nov 1954 and scheduled large 18,000 ton missile cruisers. The T41 design was upgraded in 1954 with extra communications UHF, HF channels, generator capacity and the addition of LRAW 960/965 to the Type 41 in Feb 1954 to play the radar picket role intended for Royalist with Commonwealth aircraft carriers and amphibious groups, meant the Type 41 no longer had the space and weight to take the massive 3/7O twin mounts. The new Type 275 Mk 6 flyplane fire control systems would be refitted to eight Ca-class destroyers instead of the Didos in 1955-59. With 3 openbacked, Mk 5 single 4.5 turrets in the small Ca it was somehow envisaged the small destroyers, preserved in the form of HMS Cavalier could somehow play a cruiser role, escorting convoys and task forces, destroying enemy trade and attacking enemy heavy units in torpedo and gun attacks as part of RN destroyer and cruiser groups. The unrealism of the role announced for the Ca destroyers nearly saw the 2nd Ca flotilla reconstruction cancelled in 1954-5. Although it is clear the RN saw their real role in the North Sea and SE Asia. The RN planned on the incorrect basis that guns would be ineffective for AA from 1963, as air targets would assumed to have increased speed from 0.9 Mach Mach 2. It was decided by Feb 1955, Mk 5 low 55 degree elevation 4.5 guns, would be adequate and accurate for GFS and sufficient surface cover for the new Type 81 GP frigates and updated Ca destroyers. A reduction in the naval budget with more standardisation of classes and gun calibre was essential and the 4.7