My dates with Dave and his wandering warm hands: The stiletto sharp chronicler of PM's inner circle recalls the night he invited her up for coffee... and his obsession with stroking her stole

ETRONELLA WYATT'S sparkling profile of Boris Johnson in last week's Mail on Sunday provoked huge discussion - despite her refusal to betray details of their well-known affair. 

Here, Petronella continues her account of Britain's leading Conservative politicians with a devastating close-up of David Cameron - a man of steely determination who seems never to put a foot, or a hand, wrong - aside, she says, from one very memorable occasion...