Waste from UK's largest opencast mine 'poses significant risk'

The closure of the UK's largest opencast coalmine in Merthyr Tydfil has raised concerns about the stability of three large spoil tips left behind. A geotechnical report highlights a "significant risk of slope instability" from the mine, with campaigners criticizing plans to keep the tips in place. The Welsh government is considering stepping in to control the final planning decision, as worries grow over the safety and restoration of the site.