The head of a drug-testing laboratory in Switzerland has denied giving banned cyclist Lance Armstrong “the key” to avoiding detection for the blood-boosting agent EPO.

Fresh evidence has emerged of how Lance Armstrong managed to avoid positive drugs tests that raises further questions about the International Cycling Union’s (UCI) involvement in the scandal.

Fresh evidence has emerged of how Lance Armstrong managed to avoid positive drugs tests that raises further questions about the International Cycling Union’s (UCI) involvement in the scandal.