In 1968 he represented Mexico in Salón Codex de Pintura Latinoamericana de Buenos Aires, where he won the prize "Premio Femirama de pintura." 1968, a crucial year in global politics, is also fundamental in Mexican history: a week before the inauguration of the Olympic Games in Mexico City, the military suppressed a student demonstration; hundreds of participants died. Impressed by the situation and in danger of being imprisoned, Ehrenberg went into exile to England with his family. It was there, with David Mayor and Martha Hellion, that the Beau Geste Press was founded, a collective of artists dedicated to publishing the work of visual poets, conceptual artists, neo-dadaists and experimental artists, many of whom were connected to the Fluxus movement. During these years Ehrenberg formed part of the foundation of the group "Polygonal Workshop," where he won the Perpetua Prize for the design and illustration of Opal Nation's "The Man Who Entered Pictures, 1974," edited by Southwestern Arts Association/British Arts Council.