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
Margaret Thatcher her premiership. Thatcher was parodied by Wells in several media. He collaborated with Richard Ingrams on the spoof "Dear Bill" letters, which ran as a column in "Private Eye" magazine; they were also published in book form and became a West End stage revue titled "Anyone for Denis?", with Wells in the role of Denis Thatcher. It was followed by a 1982 TV special directed by Dick Clement, in which Thatcher was played by Angela Thorne. Since her resignation as Prime Minister in 1990, Thatcher has been portrayed in a number of television programmes, documentaries, films and plays. She was