In our own tests at Consumer Reports, we found that the recommended kits showed no false positives and no false negatives.

NPR: Do Home Lead-Testing Kits Work?

In secret shopper tests, the Communications Consumer Panel found that over half of shoppers were given inaccurate information.

BBC: Mobile firms failing on coverage

MPs rejected a motion calling for the government to ensure that the police and fraud specialists investigate criminal networks involved in horsemeat adulteration and speed up the FSA tests to restore consumer confidence.

BBC: Horsemeat scandal: 'Too trusting' on meat supplies