400 to 175 in Great Britain
It was a first vote but it looks quite good 400 to 175 in Great Britain for Marriage Equality.
Margot James A Conservative MP gave a very compelling speech in favor as did several other gay Conservative MP but it was a defeat for Cameron as more than half his party were not in favor. Still he did win the votes of 126 Conservative members I can't imagine anything like that in the US. You know US Conservatives are a curious lot.
Civil Unions already offered all the same rights as marriage but as one Conservative MP (already in a civil union put it) none of you asked your beloved "will you marry me so that we will share in all the legal benefits that marriage offers"
Here is a link that might be useful: Cvility Updated/Upgraded