Info on the "Alternative 3" TV-movie

-Here's the lowdown on "ALTERNATIVE 3" from a TV-movie compendium.
"ALTERNATIVE 3" (GB 1977; 52m, colour) Amusing spoof
documentary about the diasappearance of various high-IQ
citizens, allegedly to form nucleus of a standby civilization
on Mars against the coming End of the World. Sly parodies of
fashionable breathless TV journalism sweetened the joke, ex-
newscaster Tim Brinton held it all together with po-faced gravity
and needless to say some supernature fanatics refuse to this day to
accept that it was anything but gospel truth, although it was
orignally scheduled for April 1st (1977). Written by David
Ambrose; directed by Chris Miles; for Anglia. -Apparently the
TV-movie was spawned by a book (or assuming the date is accurate,
vice versa) of the same name. Written by Leslie Watkins, it was
published by Sphere Books Ltd. in 1978