Re: @ peter_dtm
it is all governed by various treaties actually. The government currently hold you Radio Receiving Apparatus licence for you (with no charge).
All 'radio' apparatus is required to be licensed. OfCom/the Radio Agency used to have a sample copy of the tv licence lying around somewhere on their web site. You may also note that I pedantically use the term apparatus as the definition is in the capability of the equipment. Note that radio apparatus for receiving Broadcast Television signals has an added section regarding the use of computer equipment to receive real time streaming of broadcast material that is in addition to and different from the (original) clauses referring to the use of apparatus for receiving television broadcast signals. Needless to say I can not put my hands on the latest iteration of the TV licence; but I did throw out an old 70s era licence a few months ago....
Your present of a COMPONENT of receiving apparatus (the sim card/TV card you refer to) does not require a licence because it is not Apparatus for the receiving of broadcast television signals; it is also NOT apparatus used for streaming video. It is merely an decrypt key that is not specific to radio apparatus at all
Even so called licence free PMR radios (or radio equipment of very low power) are technically exempt from requiring the issuing of a licence (note again not exempt from a licence...).
All radio equipment (radios; TVs; PMR walkie talkies; mobile telephones; wireless routers etc) are made to (international) standards and work in either specific bands or on spot frequencies. Where exempt from licensing you can go buy & use to your hearts content. Use some of the non licence exempt frequencies (the vast majority of the radio spectrum) and you need a licence to HAVE the equipment in your possession. People who are allowed to 'play' with radio equipment always have to have a licence OR are legally limited in what they are allowed to do. So I am licensed to operate; repair and experiment with radio apparatus for the Amateur Radio Bands (see relevant Radio treaties and regulations eg BR68 which is the Amateur Radio Licence issued by the Radio Agency). Someone doing business repairing PMR radios either has their own licence to work on certified equipment - or works under (cough cough) supervision of a duly licensed person.
I guess I didn't end up pointing you to a copy of your TV licence - but troll through the assorted different types of licence on the Radio Agency/OfCom web sites & you will soon get the feeling about how it all works. That is; if you can stand the turgid, pedantic and recondite language used.
As an illustration; the Radio Agency does not normally prosecute people who end up with Amateur Radio apparatus because their licensed partner/parent/guardian/child died - but they don't expect them to hang on to the kit (or use it !) indefinitely either.
In summary :
By international treaty (IIRC started with the Convention of London around 1911) ALL radio apparatus must be licensed.
Some apparatus using defined frequency bands may be made licence exempt
Some governments (UK US etc) hold licences on your behalf (eg broadcast radio receivers which are still licensed as they do not operate in an exempt band)
BR68 is an example of a radio licence - other examples are available on either OfCom or Radio Agency web sites