Freeview Receivers
Now that we are completely digital in the UK, you will not be able to watch terrestrial transmissions unless your TV has a digital tuner or STB (Set Top Box) fitted to it.
Even if your TV is digital you may still need a HD Set Top Box if you want to view the BBC and ITV HD channels as the majority of digital TVs do not have a HD tuner fitted.
If you are looking to record your favourite programs, like you used to on a VCR, then the best solution is a Freeview+ STB, these are available for SD and SD/HD recording.