The Lydd Airport Action Group has been campaigning against the expansion of the airport.
Louise Barton told ITV News it would continue to fight the plans and expected the proposal now to be embroiled in years of legal wrangling.
"The whole nuclear safety argument has been completed disregarded," she said.
More top news
Some tips from Hampshire Fire and Rescue service on how you can stay safe from the risk of fire this festive season.
The director of the yachting management firm for the Cheeki Rafiki has entered a plea of not guilty to the manslaughter of the yacht's crew
Monday afternoon's weather for the east of the region