Sir Charles Grover was a strongly pro-environmentalist politician and the author of Last Chance for Man.
He was made the Minister with Special Powers when dinosaurs appeared in London. He was secretly the head of Operation Golden Age. He sabotaged the Third Doctor's and UNIT's efforts to resolve the crisis. When he was exposed, he activated Professor Whitaker's time machine, but the machine sent Whitaker and him to an unknown moment in the past because the Doctor had reprogrammed the device. (TV: Invasion of the Dinosaurs)