One leading London businessman - whose name is known to the Standard - is accused by many British Sudan experts and academics of being at the heart of the illegal commodities trade to the Khartoum regime. The man, who has lived in north London for many years, has served a succession of governments in Sudan and acts as a conduit for "strategic commodities", including chemicals and arms, through his substantial shipping business and a German front company. He is also understood to invest some of the regime's oil revenues in European companies. The man, whose involvement with convicted arms dealers in the Eighties on Sudan's behalf has been documented, is known to the British authorities but no action has been taken against him.