From The Telegraph:
The number of badger setts in England has more than doubled in the last 25 years, a new report has claimed, fuelling concerns over the spread of bovine tuberculosis.
Researchers believe the number of badger groups has risen by about 2.6 per cent each year for a quarter of a century. There are now an estimated 71,600 badger groups in England and Wales, up by 27,000 to 40,000 since the mid 1980s with the biggest change seen in England.
The number of badger setts has increased by 103 per cent in England while in Wales it has remained fairly constant, the team found.