As Nina well knows, the tune is "You can stick your fucking chariots up your arse".
This is a folksong variant used by the Rugby Union community the world over, including New Zealand, South Africa and now Italy, I believe.
The song is a traditional song/response oeuvre where the Poms {actually to be precise, the Nigels) drone on about swinging low their sweet chaaaaariots and are met with the above response.

Some Jocks over here at the World Cup advised me that the tune is another variant - of "Ye canny shove yer granny aff a bus".

Ah, the folk process is a wonderful thing.
Perhaps, in the same vein, the nigels and nigellas could in turn respond with:
"One cannot shove one's chariot up one's arse", accompanied by the appropriate hand signals, of course.

Just trying to be helpful. How's the weather over there?

G'day