The Government plans to roll out badger culling more widely in hotspots of the TB disease, if this weekend's pilot culls are successful.
The costs of the cull will be borne by farmers.
But experts, including scientists behind the long-term trial, have raised concerns that the policy will have "unimpressive" results in reducing TB and suggested that it does not make economic sense.
And protesters, led by rock star Brian May, have pledged to do everything possible to stop the cull, which they claim is not justified by the science and is inhumane.
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