A call to the PR agency's London offices confirms the news that Gillian Duffy is its latest client.
The "Bell" in Bell Pottinger is Lord Bell, Mrs Thatcher's one-time PR chief. We're assured that Lord Bell is very "hands-off" these days, but an intriguing link nonetheless.
My source, with impeccable connections to the industry, says Mrs Duffy's daughter works for a law firm that is already a client of Bell Pottinger North.
Of Brown's nemesis, the source adds: "Personally, I wonder who's paying the bills, because Bell Pottinger don't come cheap."