Sir Robert Armstrong, the Cabinet Secretary, held an inquiry into the leaking of Mayhew's letter and reported his findings to the Prime Minister on 21 January. Armstrong concluded that Brittan had told Bowe to leak Mayhew's letter through a telephone conversation to Roger Mogg, Brittan's private secretary. Thatcher is said to have asked Brittan four times: "Leon, why didn't you tell me." Havers, who demanded the inquiry, later claimed: "Unless the PM is the most marvellous actress I've ever seen in my life she was as shocked as anybody that in fact it was on Leon Brittan's instructions." At the time Brittan claimed he had misunderstood Thatcher's wishes but later (on the television programme "The Thatcher Factor" on 7 April 1989) admitted that he had acted on the "express" instructions of Charles Powell and Bernard Ingham, Thatcher's two senior advisers. On 23 January, Thatcher had to make a speech to the Commons on Armstrong's inquiry. The following day's "Glasgow Herald" described Thatcher's speech as "lackluster". Scottish Conservative MP and former Trade Minister, Alex Fletcher responded by saying that "the integrity of the Cabinet" was at stake and asked Thatcher if she thought her statement had "enhanced the integrity of your Cabinet?", reportedly causing Mayhew and Havers, to wince.