Using magical butterflies, Lord Mountbatten and Lord Solly Zuckerman do not oppose the TSR 2 project seriously enough to put the Australians off of buying it, and the approval is given with a target operational Date of January 1st 1967.
If the RAF and RAAF buy them and they are produced, who else would and what would the operational consequences be for other aircraft be? e.g. F111, PANAVAIR/BAE Tornado/SU-24 Fencer?