Aeroplane Monthly’s November edition details the SAAB Lansen, it states that with the Viggen not expected in service until 1971 a Lansen improvement program was started and other alternatives were looked at. The options being licence production of the Buccaneer or F-4 Phantom “In the event the Buccaneer was deemed unsuitable and the Phantom too expensive” So this story at least proves some sort of consideration of the F-4