At the heart of our operation is the TV Licensing database. This contains more than 29.5 million home, business and student addresses, telling us which of these have a TV Licence. All of our Enforcement Officers have access to this database and can check whether or not you have a licence. We also have a fleet of detector vans, which are capable of detecting the use of TV receiving equipment within 20 seconds, and many of our Enforcement Officers carry hand-held detection devices too.
[Hat tip to Flares Into Darkness]