December 30th marks the date that the Investigatory Powers Act, also known as the 'Snooper's Charter' officially comes into force, allowing the government to collect data on anyone.
The government says that the new laws will primarily be used to combat serious crimes such as terrorism, but campaigners have warned that it could lead to innocent people being convicted of offences they didn't commit.
The new legislation, described as "world-leading" by home secretary Amber Rudd, will primarily be used to carry out bulk email surveillance, as authorities look to monitor communications between suspects.
However it could also be used to monitor other personal information, including phone records and web browsing history, with web and phone companies required to store this information for 12 months.
The companies would also need to be able to provide police, security services and official agencies with access to this data whenever required.