I wasn't aware of this. It was mentioned on another thread since I googled and found these 2 articles.:
www.wired.co.uk/article/porn-block-uk-wired-explains
www.google.com/amp/s/www.forbes.com/sites/julianvigo/2019/03/27/why-the-uks-porn-block-is-necessary-for-society/amp/
The wired article discusses why the block won't work. The Forbes article discusses why it is necessary and how it is so destructive. Excellent points about trafficking, domestic violence,sexual expectations, erectile dysfunction etc