Wales has a different approach to policing the various acts that apply to badgers. The wildlife and countryside act allow the destruction of animals if it is a welfare issue and the local police are understanding of this.
In fairness the behaviour of badgers that are TB infected is significantly different and they tend to stand out. They are also more prone to being roadkill as they are seriously ill, which is part of the reason that road-kill badgers have a very high infection rate of TB 1 in 8 in the west.
TB is not an easy disease to kill, it used to be called consumption. It really doesn't matter which animals fault it is, all that can be said is:
It is safe to drink milk [pasteurised]
It is safe to eat beef [tested]
It is not safe to have contact with badgers in areas where TB is endemic
It is unwise to allow domestic pets to have contact with badgers in areas where TB is endemic.
In country areas this is dealt with locally, in suburban and urban areas it is a primarily a political issue not a health one and there is no perception of risk and to urban dwellers there is no risk.
If you live in a TB area especially if you have children then just take care
