Watch in full: Louisa Wall speech supporting same-sex marriage
Huge cheers from a full parliamentary chamber greeted the historic vote, in which 80 MPs favoured a law change and 40 opposed it. The bill's sponsor, Labour MP Louisa Wall, said she had been hoping for 61 votes - the least needed for a majority in the 121-seat house. To get 80 was "very special". Ms Wall told the House: "Today is the time to open the institution of marriage to all people who are eligible. There is no reasonable ground on which the state should deny any citizen the right to enter the institution of marriage if he or she chooses."