The Big Three, words and music Jim McLean 1969.
(following a request from Wolfgang for the lyrics)
It was recorded by Alastair McDonald on an LP called Scotland First. He imitated the spoken voice of each leader hence the brackets.

I wrote this as a Scottish 'electioneering' song and the Big Three were Labour, Conservatives and Liberals. It's well out of date as far as the names go but the politics seem strangely familiar … plus ça change.

Keir hardy was a man who came from our land,
And said all men should be free,
But Wilson's in his place and it's a different case,
And he won't be getting any help from me,
'Cause he lets Yankees in the Holy Loch and backs them in Vietnam
For the Ibos in Biafra he just didn't give a damn.
"It's thirteen years of Tory rule that got us in this jam!" (spoken like Wilson)
Ach I'll no' vote for Harold, no' me, no' me.
I'll be voting for the SNP.

Captain Heath wants my vote, this messer in a boat,
He says he'll tighten law and order,
They'll be polismen galore, chappin' on each Scottish door,
Till he's satisfied he's pacified the Border!
Remember back there in the good old days before the Labour came,
When the Tories were in power, they were saying just the same.
"It really isn't our fault, chin up now, play the game" (spoken like Ted heath)
Ach I'll no' vote for Edward, no' me, no' me.
I'll be voting for the SNP

Jeremy Thorpe does his bit and on the fence he'll sit,
Arguing about Federation,
But we all know the score for a Union's been before,
That's why Scotland's just a region no' a nation.
For he's a wishy-washy-waverer with Grimmond for a pal,
He thinks we're all too stupid or too poor to rule ourself,
"We're all English, I mean British, I mean, dash it, what the hell!" (spoken like Thorpe )
Ach I'll no' vote for Jeremy, no' me, no' me,
I'll be voting for the SNP.