It was intended to be in a show called 'Guarding the Change' at - I think - the Lyric Theatre Hammersmith
Britannia:
Our dearest & most beloved subjects, people, compatriots and allies.
It pleases us to be here in your country especially in this dear & well-beloved season of the spring /summer /autumn /winter in order to carry out our duties at this investiture /opening /funeral /wedding /signing of death warrant.
We declare this bridge /dam /arsenal /baby farm open /closed /independent /abolished /knighted.
Let Empire /Commonwealth /Loose Association of Nations with common interests /partners in trade /bitter enemies rest assured our thoughts /good wishes /carpet salesmen /aircraft carriers are on their way towards you.
And so on this beautiful morning /afternoon /evening, what else is there to say, but hallo /how-do-you-do /goodbye/ well done /arise Sir Robert Menzies!
Hmm, hardly desparately dangerous stuff, but obviously too disrespectful of royalty for 1965!