Campaigners say internal papers reveal public could receive more heavily treated water through their taps
Environmental campaigners have raised concerns about potential contamination of the drinking water supply during the construction of the HS2 high-speed rail link, after the company was ordered to disclose internal documents that provide frank assessments of the risks.
The documents were revealed following a battle lasting more than two years. A Green party member, Sarah Green, unsuccessfully tried freedom of information requests and the information commissioner to gain access to the internal analysis of risk to water supplies from the HS2 project before a tribunal ruled in her favour, ordering the rail company to disclose three unredacted water risk assessments to her.