http://www.aljazeera.com/news/europe/2013/05/20135224530852641.html
Source: Al-Jazeera English, no author listed

"A bill to legalise gay marriage in Britain has passed a crucial hurdle in parliament, despite efforts by the majority of politicians from Prime Minister David Cameron's Conservative party to wreck the plans."

It passed in the House of Commons 366 to 161. It will go to the House of Lords next month.

Just a bit of an update:

Gay marriage plan 'paves way for polygamy', says Lord Carey
http://www.bbc.co.uk/news/uk-politics-22727808
Author: None listed Source: BBC

" Same-sex marriage sets a "dangerous precedent" which could lead to sibling marriage or polygamy, says Lord Carey.
Ahead of the Lords debate on the bill next week, the former archbishop of Canterbury argued there could be "unintended consequences". "

"On Thursday the Bishop of Salisbury, the Rt Rev Nicholas Holtham suggested in a letter to the Telegraph that it was time to "rethink" attitudes about same-sex marriage, as Christians had done with slavery and apartheid."

The bill is expected to have a tough time getting passed in the House of Lords.