The bill was examined in 13 sittings by the Marriage (Same Sex Couples) Bill Committee, a public bill committee established to scrutinise the bill line by line. The bill completed its committee stage on 12 March 2013 and had its report stage in the House of Commons on 20–21 May 2013. The third reading took place on 21 May, and was approved by 366 votes to 161, with the bill receiving its first reading in the House of Lords the same evening.