Post-It note proves revealing

London mayoral candidate Ken Livingston’s protests that someone hacked the council’s e-mail system to expose crony Lee Jasper’s lurid correspondence with a married woman made entertaining reading. The truth is less interesting but more instructive.

Andrew Hosken’s new biography, Ken: The Ups and Downs of Ken Livingstone, reveals that a temp found Mr Jasper’s password written on a Post-It note. This allowed the temp to log in and print off the salacious e-mails that eventually won former BBC reporter Andrew Gilligan a Journalist of the Year Award.

Downtime expects Ken to have already ordered a two-factor authentication scheme to protect those afflicted with short-term memory difficulties, banned 3M’s best-selling product and instructed HR to re-do the background checks to weed out anyone with a malicious sense of humour.