An attempted terrorist attack in Britain over the Christmas period is "highly likely", the Home Secretary said today.John Reid said that around 30 conspiracies were under preparation, and the current threat level was "very high indeed". He told GMTV Sunday that he did not think it an attack was inevitable, but that "the terrorists only have to get through once, as they did on July 7, for us to see the terrible carnage that it causes". "Our security services have to be successful on every occasion to prevent that happening," he said. "I try to walk the tightrope between being...