The global tracking system known as Facebook has warned that the UK govt has made many more requests for data than normal..http://www.theguardian.com/world/2015/nov/12/facebook-says-governments-seek-more-and-more-user-data-and-takedowns
Facebook has said government requests for data and demands for content to be taken down surged in the first half of 2015, which the social network has seen continually increase since it began publicly releasing such data two years ago.
Government requests for account data globally jumped 18% in the first half of 2015 to 41,214 accounts, up from 35,051 requests in the second half of 2014, Facebook said in a blogpost.
The amount of content restricted for violating local law more than doubled compared with the same period in the second half of 2014 to 20,568 pieces of content, it said.
Facebook said. The government often requested basic subscriber information, IP addresses or account content, including people’s posts online.
I suspect many of these cases are in regard to normal crime and the rest are to do with the fight against the jihadi groups whom use facebook as a recruiting tool, of course that becomes a two way street when your location data is shared with your enemies.