The BBC’s parliamentary correspondent Mark D’Arcy reviews the bizarre twists and turns of the extraordinary and chaotic past few weeks of debates and voting on Brexit in the British Parliament, from the record-breaking defeat for the government to the crucial vote prevented by procedural rules dating from 1604. And he examines the role played by the personalities of the controversial characters in this drama, including prime minister Theresa May and the House of Commons speaker John Bercow.