In a a paper now available on the Defra website, they say;
....In particular, hedgehogs are thought to be particularly vulnerable. Research by CSL in conjunction with the Randomised Badger Culling Trials (RBCT) revealed that hedgehog abundance and distribution were negatively correlated with indices of badger density. Even in suburban habitats the abundance and probability of occurrence of hedgehogs declined rapidly as indices of badger density increased in the surrounding areas.
Got that? In plain English, too many badgers = no hedgehogs. They eat them like an orange we are told. Roll the little poppets on their backs, spread out their legs and peel them like a Jaffa, leaving just the skin behind. Nice.