The survey was carried out in the RBCT counties of Cornwall, Devon, Gloucestershire, Herefordshire, and Worcestershire.

BBC: NEWS | UK | England | Devon | One in seven badgers has TB signs

This was done by comparing data with findings from the Randomised Badger Culling Trial (RBCT).

BBC: NEWS | UK | England | Devon | One in seven badgers has TB signs

Ongoing research around the RBCT culling sites also shows that while the benefits of culling within the trial zone persist for some time, the spike in infections around the edges - the perturbation effect - tends to dissipate over time.

BBC: Badgers back in the firing line

That was the emphatic, and damning, conclusion reached by Professor John Bourne, the man charged with assessing the biggest and most comprehensive scientific experiment ever conducted in the British countryside - the Randomised Badger Culling Trial, or RBCT, in June 2007.

BBC: Badgers back in the firing line

During his two and a half years running Richards Bay Coal Terminal (RBCT) on the northern coast of KwaZulu Natal, Mr Dlamini has done much to improve tense relations with the government and the state-owned rail company that brings coal to the terminal.

ECONOMIST: Face value

Covering some 400 square miles of open countryside, the trial sites are much larger than the ten-by-ten kilometre box squares used in the RBCT, and have been carefully chosen to take advantage of natural barriers to the movement of badgers like the M5 and M50 motorways and the river severn.

BBC: Badgers back in the firing line