From 1983: A chance to join the WEETABIX FAN CLUB... and I did.
Fan Clubs were, in the pre-internet age, a tried-and-tested way of reaching out to young consumers and buying their ongoing loyalty with the obligitory membership kit (see above) and the occasional mail-out when you have something specific to flog or feel you need to remind your membership of their loyalties.
I was never a great fan of Weetabix... but it was the breakfast table staple when I was little. So, of course, I signed-up for the club. And, although long since lost, I seem to remember the membership kit was pretty cool. And I'm fairly sure they sent out further issues of the comic for at least a little while.
This ad appeared in a December copy of the EAGLE.