LONDON — As the British Parliament prepared to vote Tuesday on a law permitting same-sex marriage that has divided church and state, senior cabinet ministers launched a last-minute attempt to deflect an embarrassing rebellion by Conservative lawmakers against Prime Minister David Cameron’s support for the new legislation.
A day after the newly-confirmed archbishop of Canterbury, Justin Welby, took office saying he shares the Church of England’s opposition to marriage between people of the same gender, three cabinet officials said in a letter published in The Daily Telegraph that the new legislation was “the right thing to do at the right time.”
“Marriage has evolved over time. We believe that opening it up to same-sex couples will strengthen, not weaken, the institution. Attitudes toward gay people have changed. A substantial majority of the public now favor allowing same sex couples to marry, and support has increased rapidly.”
The three ministers — George Osborne, the chancellor of the Exchequer, Foreign Secretary William Hague and Home Secretary Theresa May — also asked whether it was “any longer acceptable to exclude people from marriage simply because they love someone of the same sex.”
The debate has divided Britain’s Conservatives, who rule in uneasy coalition with the smaller Liberal Democrats. Political analysts forecast that, when the vote is held on Tuesday evening in Parliament, it will be approved despite opposition by scores of Conservative lawmakers because the bulk of Liberal Democrat and opposition Labour legislators are in favor.
However, that outcome could embarrass Mr. Cameron since he will be securing approval for a change that he has championed with the support of his political adversaries and in the teeth of opposition from within his own ranks. The size of the likely revolt among Conservative lawmakers is uncertain, but Mr. Cameron’s allies are trying to reduce it, seeing the vote as a test of his authority.
Opponents of the legislation say it will alienate traditional Conservative voters, jeopardizing Mr. Cameron’s prospects at the 2015 national election. But supporters say it will bring in new backing from outside the party.
Coincidentally, the vote is scheduled a day after Archbishop Welby, 57, was confirmed in his new post to replace the Most Rev. Rowan Williams, who has retired 10 years in office.
The new archbishop, the spiritual head of the world’s 77 million Anglicans, endorsed the traditional view that while the Church of England has no objection to civil partnerships between people of the same gender, it is, as a recent church statement put it, “committed to the traditional understanding of the institution of marriage as being between one man and one woman.”
Ed Miliband, the leader of the opposition Labour Party, said Monday that he would be “voting for equal marriage in the House of Commons, and I’ll be doing so proudly.” He also said he would urge his 255 legislators in the 649-member body to vote with him, although a small group will likely vote against.
“I’ll be voting for equal marriage for a very simple reason: I don’t think that the person you love should determine the rights you have,” Mr. Miliband said on Monday.
The legislation, which applies to England and Wales, would permit civil marriage between same-sex couples, but specifically exempt the Church of England and other faiths from an obligation to perform such ceremonies. Some faith groups, including the Quakers, have said they want the legal right to perform same-sex marriages.
In their letter, Mr. Osborne, Mr. Hague and Ms. May said: “Our party also has a strong belief in religious freedom, a vital element of a free society. The Bill ensures that no faith group will be forced to conduct same-sex marriages. The legal advice is clear that these protections for religious groups cannot be overturned by the courts.”
“Religious freedom works both ways. Why should faith groups, such as the Quakers, that wish to conduct gay marriages be forbidden from doing so? This Bill will enhance religious freedom, not restrict it.”