How I made the Met Office admit its climate-change data was wrong - Times Online

"Using my laptop and my knowledge of computer programming I accidentally uncovered errors in temperature data released by the Met Office that form part of the vital records used to show that the climate is changing. Although the errors don’t change the basic message of global warming, they do illustrate how open access to data means that many hands make light work of replicating and checking the work of professional scientists...."