Hi, I can help with this one. It was from BBC Time and Tune, Spring 1973, from a story called La Campanelita. The song was called Sun Bird:

Sunbird tell me the story
Of a day long ago,
When the sun left the heavens,
And the clouds turned to snow

To a girl in a village
Came a king robed in gold
They were happy together
So the story was told.

Then the king had to leave her
And he never returned,
But the heavens were shining
And the golden sun burned.

For the girl, left alone, now,
Waiting days were so long
She became lovely sunbird,
And keeps singing her song.


I've just tracked down the sheet music for this - if you want a copy drop me a line via the 'About' section on my website www.antonuzzo.com