Links have been uncovered between the two teams of bombers who have brought terror to the streets of London over the past two weeks, say security sources.
Police now believe some of the men they are pursuing for last week's abortive attacks - on Shepherd's Bush, Oval and Warren Street tube stations and on a No 26 bus in Hackney - attended a whitewater rafting trip at the same centre as two of the 7 July bombers, Mohammad Sidique Khan and Shehzad Tanweer.
This raises the distinct possibility that the two operations were connected as part of a larger plan to bring carnage to the capital.
Evidence discovered in the rucksacks left behind by the failed bombers led police to three addresses in London. When investigators cross-referenced them with the electoral register they discovered names that tallied with those of individuals who attended the outdoor adventure course in Snowdonia last summer.
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