Morticia, can't think why you'd be surprised that Tom Lehrer did the song. And as for thinking any Mudcatter could confuse Lehrer with someone else....

Lehrer was a regular on the show (called the Frost Report, I think), alternating with either Jake Thackeray or Julie Felix - can't remember which. Most of the songs he did were topical, and don't appear in the published canon.

I can confirm that he did a song about decimalisation, but can't remember any of the lyrics. One that does stick in my mind listed who disliked who around the world, ending with: "And everyone hates the jews." Can anyone add to that?

One other point: does any versions of the songbooks include scores that even remotely approximate to Lehrer's scintillating piano accompaniments, or has anyone attempted to write out transcriptions?