Educated at Harrow School and the London School of Economics, Detmar Blow studied law and became a barrister in 1989. In 1998 he, Isabella, and Stuart Shave set up the gallery Modern Art, one of London's most successful contemporary art galleries. He and Isabella established Blow de la Barra gallery in 2005. Detmar divides his time among Lisbon, London, and Gloucestershire.