The design of the Randomised Badger Culling Trial (RBCT) considered the number of TB breakdowns within trial areas at the herd level and not at the individual level. Data on the number of individual reactors and dangerous contacts slaughtered in connection with the RBCT can be obtained from VetNet, DEFRA's bTB control and surveillance system. However, this would be the subject of a separate data analysis exercise, which would be available only at disproportionate cost.