The claim is that HS2 Enabling Works in the Mid Colne Valley breach the Water Framework Directive. Hundreds of piles will be driven into the chalk aquifer for the Colne Valley viaduct in an area where our drinking water is drawn from. Also in the vicinity are landfill sites and areas of the aquifer which are already polluted. HS2 are cutting through this inner source protection zone with the Copthall Cutting.
The Green party want to hold the UK government to account in up holding environmental standards. Clean water standards may be less stringent after Brexit. At the moment high quality water standards apply.