Iains: We need to change how we grow our food if we are to retain any wildlife diversity, including foxes, badgers and birds of prey. The village where I live is surrounded by arable land, including a large field at the end of the garden. This field is a biodiversity desert; it's farmed for sileage and contains pretty much one type of grass and nothing else. This provides cover for the odd pheasant but even the rabbits don't visit much. Our neighbours have been here for over 50 years and they remember a far more vibrant ecosystem being present, with hares boxing in the field. We've never seen a hare here in the decade we've lived in the house, the badgers in the sett opposite mysteriously disappeared and the setts filled in... hmmm.

"his dairy cows failing their TB tests due (perhaps) to badgers transferring the disease"

Vaccination and controls over movement would go a long way to sorting this (including vaccinating the badgers), and unless you're going to kill EVERY badger in the country then this is the only way forward.