Ross joined the Trotskyist International Marxist Group (Image) in the late 1960s. He worked with Bob Pennington to form the Image Opposition Group. They increasingly ceased to function as a normal left-wing group and became a group of advisors to Livingstone.
He wrote the book Thatcher and Friends - the Anatomy of the Tory Party (1983), and the journal article "Management Philosophy of the Greater London Authority".
He was Ken Livingstone"s Policy Director of Economic and Business Policy. He is a senior fellow at Chongyang Institute for Financial Studies at Renmin University of China.