JOHANNESBURG businessman Tony Teixeira has demanded an apology from British foreign office minister Peter Hain, after the South African-born Hain named Teixeira as being involved in breaking United Nations sanctions against Angolan rebel movement Unita. Hain made the claim in the British House of Commons earlier this week, when he named three international businessmen as sanctions busters. He accused Teixeira of supplying diesel to Unita rebels in contravention of the UN embargo. Teixeira has denied the claim, saying he is a partner with the Angolan government in diamond deals, and that he would therefore not also be involved with Unita.