Trans rights groups, trade unions and community organisations were holding an "emergency demo" outside parliament on Saturday, following a Supreme Court ruling on the legal definition of a woman.
A rally and march organised by Resisting Transphobia was also taking place in Edinburgh on Saturday., while other protests across England and Scotland.
The London event was described as an "emergency demo" by several supporters in social media posts.
• Subscribe to ITV News on YouTube: http://bit.ly/2lOHmNj
• Get breaking news and more stories at http://www.itv.com/news
Follows ITV News on TikTok https://www.tiktok.com/@itvnews?lang=en
Follow ITV News on Instagram: https://www.instagram.com/itvnews/
Follow ITV News on Facebook: https://www.facebook.com/itvnews/
Follow ITV News on Twitter: https://twitter.com/itvnews
