Locus and Wikipedia are reporting that British writer Colin Kapp died on 3 August 2007. Born in 1928, his first science fiction appeared in the New Worlds anthology series in the late 1950s. He later had work in Analog, Galaxy, and Worlds of If. His first novel, serialized as The Dark Mind in New World of Science Fiction, was published under that title by Corgi in 1965, and as Transfinite Man by Berkley in 1964. Other novels include The Patterns of Chaos, The Wizard of Anharitte, Survival Game, The Chaos Weapon, Manalone, The Ion War, and the four-volume Cageworld series published by New English Library and DAW in the 1980s. A collection of short stories, The Unorthodox Engineers, was published in 1979. Many of his book were translated into French, German, and Italian.
SFWA reports that Kapp’s short story “Lambda One” was adapted for the TV series Out of the Unknown in 1966, and that he was the Guest of Honor at the 1980 British National Science Fiction convention in Glasgow.
This page has an almost overwhelmingly complete bibliography/biography of Kapp.