Hey, Tunesmith, the first time I heard Three Score and Ten was on the first of April 1958, before noon, a BBC Documentary about "Mods" and old folks fighting over "turf at Brighton, August Bank Holiday. There were shots of old geezers charging down the hill in wheelchairs, using thei crutches for lances, cackling with glee, etc. etc. In the Background was a measured performance of "Three Score and Ten". I laughed myself silly.

The only other April Fools BBC thing I remember was the Great Spaghetti Harvest documentary with Richard Dimbleby (BBC's voice of authority) narrating it.

For those of you who've never been to England, On April 1st each year, you should not believe anything you hear or see on BBC before noontime.