As a broadcast journalist, Willcox worked for ITN for many years as a presenter and correspondent. He was the network's Arts and Media Correspondent, and after joining the news team presented the network's live reports from New York City during the 11 September terrorist attacks. Willcox also presented the ITN Morning News in the 1990s, and was the first ITN journalist to break the news of the Paris car crash in 1997 that led to the Death of Diana, Princess of Wales.