Notable as a journalist for the Daily Express, the Evening Standard, the Daily Mail, and The Times, he is also known for his historical works and biographies of prominent sailors and ship captains. His full-length publications include Captain Marryat, The Terror Before Trafalgar, and Sailor King: The Life of King William IV. Following his brief World War II-era service in the Royal Navy, Pocock began his journalism career at the age of nineteen and was one of the first media representatives on hand at the liberation of the Bergen-Belsen Nazi concentration camp.