Kent News: Environmentalists have warned that building a new coal-fired power station in Kent would mean the Prime Minister has "surrendered" on carbon emissions targets. Plans by energy company E.ON to replace the existing four-unit coal-fired power station at Kingsnorth with a new two-unit one are currently being considered by Medway Council. Should they approve the plans, they would then go to Gordon Brown for the green light next year and the plant could then be operational by 2012 or …