An intriguing passage in an article by the ex-Commissioner of the Metropolitan Police today:
In a speech two years ago, I estimated that there were about 6,000 organised criminal groups in the UK, with a total of around 38,000 individuals. Most of them operate without being disrupted by the police: indeed, in 2010, I estimated that nearly 90 per cent do. That was better than the figure for 2003, which was 94 per cent.
Link:http://www.telegraph.co.uk/news/ukne...sed-crime.html

Organised crime has not been my area of interest, but I cannot recall seeing such an estimate in the British public domain before.

Anyone aware of any similar local, regional or national estimates of effectiveness?