The RAF had priority and the Royal Navy view that development should centre on frigates and large carriers was not liked by the old PM and the cruiser reconstruction programme was suspended for three years; also delayed by the immediate and changing priorities of the Korean War and the great difficulty and expense of developing compact steam propulsion with adequate range and speed and good close in defence for the destroyers and frigates. A radical defence review in June 1953 saw heavy naval cuts but "Royalist"s modernisation continued under a revised defence White Paper in February 1954 which restored the RN programme and plans to complete "Hermes" and the "Tiger"s, but rejected starting further "Dido"/ "Bellona" conversions; they lacked the 'dual war and peace, cold war capabilities' required for the RN. The postwar RN programme envisaged that Soviet bombers would be improved Boeing B-29 Superfortress (Tupolev Tu-4) or Lincolns flying at 320 mph at 4.4 miles height, however on May Day 1954, it was clear 5.25 guns would be marginal against the new Soviet Tupolev Tu-16 "Badger" and Myasishchev M-4 "Bison" bombers flying 7 miles high at ; it took 30 seconds for 5.25-inch shells to reach that height. A frigate with just one Mk 6 4.5-inch turret could not destroy jets 5.5 miles high. But "Royalist" was then suspended and reviewed in the 1955 Defence White Paper which decided on a scaled down cruiser programme of extended refit for colonial rather than NATO service.