Lookup companies and see which ADR scheme they belong to.
Spectrum Information System (SIS) provides information on how radio spectrum issued in the UK, including the types of Wireless Telegraphy Act licences available from Ofcom and details of tradable licences. http://spectruminfo.ofcom.org.uk/spectrumInfo/
Sitefinder is a voluntary scheme under which mobile network operators make information available on the location and operating characteristics of individual base stations, so that people who wish to inform themselves about this can do so.
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