An investigation is underway into an oil leak at one of Kent’s most historic rivers where wildlife has been reported dead. The spill was identified in the Great River Stour, near Canterbury and was discovered to be coming from the decommissioned Chartham Paper Mill site. The Environment Agency (EA) is leading the investigation after it received 35 reports in 24 hours and found a dead bird and fish. It says its officers continue to work with contractors to find evidence of environmental harm. An unknown amount of synthetic insulating oil was found to have entered the drainage system into the ri…