Complex sentence: He also helped organize a number of UK SF conventions and ran the art show at Seacon, the world SF convention in 1989 and was guest of honour in Glasgow at Albacon III in 1986 alongside Joe Haldeman, John Jarold and Clive Barker.
Split into simpler sentences: He also helped organize a number of UK science fiction conventions and ran the art show at Seacon, the world science fiction convention in 1989. He was also a guest of honour in Glasgow at Albacon III in 1986 alongside Joe Haldeman, John Jarold and Clive Barker.