The proportion of farmers estimated to have killed badgers should be considered by policymakers and in the wider debate.
Intensive badger culling is one approach being considered by policy makers, in an attempt to control the spread of tuberculosis in cattle. However, studies investigating the effects of badger culling on TB outbreaks in cattle have not factored in the prevalence of illegal badger killing, and its potential to spread disease.
More top news
The world record attempt will raise money for the foundation set up in memory of the Olympic gold medallist, who died in May 2013.
In today's Newsweek, Carl talks about what the 'No' vote in the Scottish Referendum could mean for Wales and the impact of legal highs.
England manager talent spotting at Swansea City v Southampton at the Liberty Stadium