Far from quitting the post to 'leave on a high', as he told PRWeek last week, he actually left after it emerged he had tried to send an email to Conservative press chief Guy Black, a friend, with personal views about the recent publication of MPs' expenses. But by mistake he instead sent it to a Labour Party official.
Stonborough tells us: 'The situation is more silly than serious. I emailed a personal note to Guy, who is a former colleague and chum - and unfortunately I sent it to the wrong place.'
Following rather negative coverage in, among other titles, The Times and The Daily Telegraph, the story has left the PR man lamenting: 'I'm sad I have lost a good client... but silly me.'