As a replacement for the four old Kingsnorth units, in October 2006 E.ON proposed the construction of two new coal-fired units, Kingsnorth Units 5 and 6. They had proposed constructing two new 800 MW supercritical coal-fired power units on the site, to be operational "as early as 2012". E.ON expected the supercritical units to reduce carbon dioxide emissions per unit of electricity by around 20%, as compared to the former subcritical plant. E.ON also said the new units would be "capture ready" to allow the option of retrofitting with carbon capture and storage (CCS). Their environmental statement read:
