The decision not to complete the new "Tiger"s in the late 1940s was due to the desire to reassess cruiser design; furthermore, the provision of effective anti-aircraft (AA) fire-control to engage jet aircraft was beyond UK industrial capability in the first post-war decade. Consequently, higher priority was given to the battleship HMS "Vanguard", the , and to the new aircraft carriers and for allocation of the 26 US-supplied medium-range anti-aircraft Mk 37/275 directors (delivered through Lend-Lease in 1944/5) The US supplied version of Type 275 High Altitude/Low Altitude DCT were stabilised and tracked multiple air targets of Mach 1.5+, the US directors were light years superior to fragile UK versions, of Type 275, the only medium range AA fire control until 1955, which could barely distinguish transonic targets at Mach 0.8. The 1947–49 period saw a peace dividend, and frigate construction became the priority in the Korean War.