Margaret Thatcher tendency to override collegiate opinion, contributed to discontent within her party. Thatcher removed Geoffrey Howe as Foreign Secretary in July 1989 after he and Lawson had forced her to agree to a plan for Britain to join the European Exchange Rate Mechanism (ERM). Britain joined the ERM in October 1990. On 1 November 1990, Howe, by then the last remaining member of Thatcher's original 1979 cabinet, resigned from his position as Deputy Prime Minister, ostensibly over her open hostility to moves towards European Monetary Union. In his resignation speech on 13 November, Howe commented on Thatcher's openly dismissive attitude to
Diana Gould – Margaret Thatcher exchange she telephoned Tam Dalyell, a Labour MP who had been pressing for information about the sinking, and asked him to brief her. Thatcher and Sue Lawley, the anchor, were in the BBC's Lime Grove Studios in Shepherd's Bush, west London, where the prime minister took questions from 18:25 until 19:00. Gould, in the BBC's Bristol studio, was the fourth member of the public to be invited to speak. "Mrs. Thatcher," she asked, "why, when the Belgrano, the Argentinian battleship, was outside the exclusion zone and actually sailing away from the Falklands, why did you give the orders to sink it?"