 Besides claims of sophisticated technological methods for the detection of operating televisions, detection of illegal television sets can be as simple as the observation of the lights and sounds of an illegally used television in a user's home at night.Detection is a fairly simple matter because nearly all homes are licensed, so only those homes that do not have a licence need to be checked.The BBC claims that "television detector vans" are employed by TV Licensing in the UK, although these claims are unverified by any independent source.