It looks as though it must have been sung on a programme called "The Five Foot Nine Show," broadcast on 31 January 1964. At least, that's the only listing I can find for Tsai Chin in a BBC comedy programme. I remember distinctly watching it*, and have been looking for the lyrics ever since. Thank you for proving that I didn't imagine it!

*Word order intentional. One didn't watch anything distinctly in those days...

Zander