Jasper has written about the arts, books, the media and sport for many broadsheets and magazines. He currently writes for the Telegraph and the Spectator. In the 1990s he also wrote about football for The Independent on Sunday. He is the author of I Found My Horn and co-author of the play of the same name. Bred of Heaven, his book on Wales and Welshness, was published in August 2011 and read on BBC Radio 4's Book of the Week. His latest book is a biography of Florence Foster Jenkins