Do you have a link Tony?
I dont have time to get into an involved debate (fighting fires I'm afaraid) but here's the Defra final report with some of their conclusions;
http://archive.defra.gov.uk/foodfarm/fa ... report.pdf
1.On the basis of our careful review of all currently available evidence, we conclude that badger culling is unlikely to contribute positively, or cost effectively, to the control of cattle TB in Britain (10.48 and 10.92).
Conclusions and recommendations
15. Detailed evaluation of RBCT and other scientific data highlights the limitations of badger culling as a control measure for cattle TB. The overall benefits of proactive culling were modest (representing an estimated 14 breakdowns prevented after culling 1,000km2 for five years), and were realised only after coordinated and sustained effort. While many other approaches to culling can be considered, available data suggest that none is likely to generate benefits substantially greater than those recorded in the RBCT, and many are likely to cause detrimental effects. Given its high costs and low benefits we therefore conclude that badger cullingisunlikelytocontributeusefullytothecontrolofcattleTBin Britain,andrecommend that TB control efforts focus on measures other than badger culling (Chapter 10).
16. In contrast with the situation regarding badger culling, our data and modelling suggest that substantial reductions in cattle TB incidence could be achieved by improving cattle-based control measures. Such measures include the introduction of more thorough controls on cattle movement through zoning or herd attestation, strategic use of the IFN test in both routine and pre-movement testing, quarantine of purchased cattle, shorter testing intervals, careful attention to breakdowns in areas that are currently low risk, and whole- herd slaughter for chronically affected herds (Chapters 7 and 10).
Interesting to note that they also state that cattle are certainly passing bovine TB to Badgers. I suggest we reduce the number of cattle in order to prevent disease spreading to wildlife.
I'll add that even if killing 70% of the badger population could be shown as effective way to reduce TB in cattle I'd be against doing so. As far as I can see that's not the case.