The president enjoyed all the pomp and protocol that traditionally come with a state visit, reflecting the importance of the man, and the emerging superpower that he represents. But as China's Hu Jintao tucked into his filet de sole pompadour during the banquet at Buckingham Palace on Tuesday, and again as he flew back to Beijing yesterday after his three-day visit, Britain's security services were left pondering a more delicate issue: how many of the president's entourage had been left behind? While on the diplomatic and commercial level relations between the two countries appear to be flourishing, with British ministers...