Sept 14 (Reuters) - Olympic and Tour de France championBradley Wiggins' withdrawal from the Tour of Britain with astomach bug on Friday has left the race without one of its mainattractions. Fans flocking to the 190 km route from Powys Castle inWelshpool to Caerphilly Castle in south Wales were leftdisappointed after Wiggins failed to start the sixth stage,which was won by Czech rider Leopold Koenig. Wiggins' fellow Briton Jonathan Tiernan-Locke grabbed theoverall lead after finishing just behind Koenig. ... More...