Final, late 1958 revisions to the design were to adopt a high flush deck from B turret, increasing internal space, the cancellation of the nuclear-tipped Seaslug, and provision for folding fins for the Seaslug, all allowing storage of 20 extra missile bodies in tubular form for rapid assembly. Against staff advice, a tight fitting, fixed side-hangar for the anti-submarine Westland Wessex helicopter was added on the insistence of the First Sea Lord. While a flawed layout, it proved usable when tested in the Falklands War in 1982.