https://www.bbc.co.uk/news/technology-58741963
https://www.ispreview.co.uk/index.php/2021/08/ofcom-consult-on-major-openreach-fttp-broadband-price-cut.html
Two links to give more detail.
Thanks!
Having checked the prices listed on one independent site I'm not sure why they see this as a threat. I doubt any ISP running on OpenReach can match 200 Mbps @ £25 per month (18 month contract).