Our mine takes all complaints and incidents seriously. Please see the following register. Complaints Register Complaints and Incidents Register 2022 - Mannering Colliery Complaints and Incidents Register 2023 - Chain Valley Colliery Complaints and Incidents Register 2023 - Mannering Colliery Complaints and Incidents Register 2024 - Chain Valley Colliery Complaints and Incidents Register 2024 - Mannering Colliery Complaints and Incidents Register 2025 - Chain Valley Colliery Complaints and Incidents Register 2025 - Mannering Colliery PagePrevious 1 2