Deputy Prime Minister Nick Clegg said the legalisation of same-sex marriage was "a great step forward".
"It's a landmark day," he said. "I am so chuffed about this change in the law."
"It's just a simple idea that if two people love each other it doesn't matter that they're the same sex - if they love each other and want to show that commitment towards each other through marriage, they should be able to do so."
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