As few as two per cent of positive Covid lateral flow test results taken in low prevalence areas are accurate, an adviser to Matt Hancock has warned. In emails, leaked to the Guardian, senior strategist Ben Dyson is said to have warned health department colleagues about the unreliability of lateral flow test results. Mr Dyson, who is an executive director of strategy at the health department and one of health secretary Matt Hancock's advisers, reportedly raised feared that the reliability of positive results could be as low as two per cent in certain areas. The email was reportedly sent on Ap...