After surviving initial votes in the House of Commons , a resurgent anti-LGBT movement among Conservatives is placing marriage equality in jeopardy. Prime Minister David Cameron is unrelenting in supporting marriage equality despite over 100 members of his Conservative Party pushing back.
While it is important for the Conservatives to push on with marriage equality, it is equally important that the Labour Party not hurt our chances by being 'too cleaver for their own good'. They must not sit on the sidelines and allow the Prime Minister to twist in the wind on this issue. Labour MP's must speak up and fight hard for marriage equality. Silence is an enemy in this case.
Nick Clegg has warned against attempts to "hijack" proposals to legalise same-sex marriage in England and Wales ahead of key votes in the House of Commons.
Tory critics have tabled an amendment saying heterosexual couples should be allowed to have civil partnerships, if gay couples are allowed to get married.
Ministers say the move, which Labour may back, would delay the whole bill.
Mr Clegg said he backed extending civil partnerships in principle but would not allow the bill to be "derailed".
And Downing Street played down any suggestions the bill would be dropped, saying the government "has a legislative programme and it is getting on with it".
The Marriage Bill was approved by a 225-vote majority when it was last debated by MPs in February, but nearly half of all Tories voted against it and many party activists remain deeply opposed to it in principle.
The legislation returns to the Commons on Monday amid other divisions within the Conservative Party on Europe and attitudes towards the party's grassroots.
David Cameron has said equal marriage would help build a stronger and fairer society, and the bill also has the backing of the Deputy Prime Minister Nick Clegg and Labour Leader Ed Miliband.
But according to ministers, reconsidering the status of civil partnerships would delay the introduction of same-sex marriage by two years, as it would prompt a fresh consultation period and possibly have a knock-on effect of adding as much as £4bn to pension liabilities.
MPs get a free vote on the Marriage (Same Sex Couples) Bill because it is considered an issue of conscience.
Tim Loughton is among a group of Tory MPs who will try to amend the bill, with a plan to extend civil partnerships to heterosexual couples.
BBC political correspondent Gary O'Donoghue said some in Westminster - including some Tory MPs - were saying the amendment was an attempt to "wreck the bill" because it could delay its passage beyond the 2015 general election.