Calls for British police to travel to China to investigate Neil Heywood death MPs say they are puzzled by the Foreign Office's intervention in a sensitive political power struggle in China when it appeared that Mr Heywood's relatives accepted the coroners verdict that a heart attack had struck down the Old Harrovian businessman, in a hotel room in the city of Chongqing. Sir Menzies Campbell, the former Liberal Democrat leader, said he feared that "some kind of game" was being played out between Britain and China over Heywood and the demise of Mr Bo's political career. "It could be a case that Heywood had found out something about corruption" said Sir Menzies said adding that Britain could be sending a message to China "that we don't want our people bumped off." There is a great deal of speculation about this matter that will not be readily cleared up unless the Foreign Office fully explains what has been happening, especially if the family is saying they don't want the matter to be pursued. Experience tells us that the facts and circumstances will come out eventually, so the Foreign Secretary must provide clarity to the House as soon as possible. Diplomatic sources said that British officials were no longer pursuing the allegations with Chinese officials in bilateral meetings. Although the claims had been raised on "multiple occasions" Chinese officials had not been pressed to investigate Mr Heywood's death in recent days. Meanwhile, the suggestion that Bo Xilai could have fallen out with his chief of police over the death of Mr Heywood is "preposterous" according to one of his friends. The source, who was unnamed, told the BBC that Mr Bo and Wang Lijun had a "normal" relationship just days before the policeman fled to the United States consulate in Chengdu, apparently for protection. Rumours suggested that Bo's wife, Gu Kailai, is under investigation for corruption. Another said Mr Bo had quarrelled with Mr Wang to protect her. Finally there came the suggestion that his family was in some way linked to Mr Heywood's death. The rumours appear to be part of a smear campaign to discredit Mr Bo, who remains hugely popular in the cities he has governed, before a final verdict in his case is delivered. Mr MacShane warned that Western businessmen faced unknown risks in travelling to China and that Mr Heywood's death appeared to be a troubling echo of the kind of mysterious deaths that had taken place in Russia. "It should worry all of us," he added. It is unusual for a respected British or indeed western middleman, whatever he was doing, to die in these circumstances.