Well, the point is that the cull has been postponed, at least until the latter half of next year. During this pause, or u-turn, they can review again the science, which does not favour a farme organised cull of badgers as part of the eventual aim of obtaining a TB free herd.
Unless you can adequately determine the badger population in a nominated area, you cannot ensure you meet the target of a shooting cull, which is to kill more than 70% of the local population - only then does the cull even start to address this issue. Making such an accurate survey of badger numbers costs money and time - and it is principally the economy of the scheme that commended it to the government in the first place.
In the meanwhile, the counter claim is that badgers, by virtue of their numbers in comparison to cattle, are an irrelevance to the transmission of TB and that better biosecurity and less contravention of the existing system by farmers would work out much better.
The best solution should really be to vaccinate the cattle - the only reason we do not is because EU rules do not permit the cross-border sale of live animals with TB, and there is currently no way to distinguish between a positive result as a consequence of the immunization or because of a TB infection - but they are working on that.