It appears that your local council could be using the Regulation of Investigatory Powers Act (RIPA) to spy on people. In this example
Poole Borough Council used the legislation which was introduced to improve national security to spy on a family to see whether they lived inside the catchment area of their child’s school. The family were watched by an undercover council official for three weeks as he made notes about their daily activities. The council justified their actions by saying "RIPA procedures have been used to investigate potentially fraudulent applications for school places” and "In such circumstances, we have considered it appropriate to treat the matter as a potential criminal matter.” It does seem a little extreme in my opinion, I wonder who else is being watched without their knowledge. I’m not paranoid, they are out to get you.