Lord John Krebs is a scientist for whom I have the utmost respect. This interview is definitely worth a listen. It starts by talking to Lord Krebs about his career and then asks his professional opinion of the badger culls. He raises some very interesting points about sample size and unreported data (namely the effect of the culls outside the study area).
All in all, this harks back to my original point that with or without badger culls, more has to change to help prevent diseases and improve conditions in farming methods everywhere.