Opponents of the law say France is not ready to legalise adoption for same-sex couples, and polls show that the country is sharply divided on the issue, despite French parliament passing it into law today.
France has become the 14th country to legalise same-sex marriage following New Zealand last week.
Thousands of police mobilised ahead of the vote, preparing for dueling protests around the National Assembly building and along the Seine River. At least one spectator was ejected from the gallery.
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The outspoken Birmingham MP tweeted a picture of locksmiths ramping up security at her home after facing fresh intimidation on social media.
Islamic State's Amaq news agency released footage showing French attacker Abdel-Malik Nabir Petitjean urging Muslims to destroy the country.
Brighter skies developing across northern Britain and Northern Ireland with some sunshine tomorrow but feeling cooler again.