Gbp/usd - 1.6653 ... Sterling fell sharply fm around 1.6752 to 1.6609 after Fitch Ratings agency said that the U.K. was 'most at risk of losing AAA status among major economies' n that Germany had the least risk. In addition, the agency said there was no near term risk to the U.S.'s sovereign rating. Eur/gbp has rallied to as high as 0.9010 as a result...