@mike – sorry, I’ve cracked that joke before 
http://www.shootuporputup.co.uk/resources/about-diabetes/circadian-rhythms/
“When I first heard of circadian rhythms I thought they were an electronic pop band from Manchester.
I then went on to imagine that they had a string of modestly successful hits during the late eighties and early nineties but split after irreconcilable creative differences opened up between the lead singer and the bass player who founded the band in the first place. After years of acrimony over unpaid royalties the members of the band (aside from the drummer, who died after a drugs overdose in 1997) reformed and had a successful reunion tour and an appearance on Later with Jools Holland.
It turns out, however, that my assumptions were wrong.”
He he he!