A ban on muck-spreading over winter months to protect rivers doesn’t work and will be changed, the Welsh government’s new environment minister has said.

The regulations - brought in by the previous Labour government - were championed by river campaigners but angered many farmers.

Llyr Gruffydd MS, newly appointed Cabinet Minister for Rural Resilience and Sustainability, said technology could be used to help manage slurry spreading rather than “farming by calendar”.