These are currently available from dedicated terminals. There are 150,000 instant access sound recordings on the Library's SoundServer. In a leaflet issued a while ago the Library revealed this enhanced collection will include TV and radio news broadcasts since May 2010; over 190,000 programmes from the BBC's archives, and UK TV and radio listings since 1995.
It remains to be seen if and when this enormous collection will be available free on-line to the general public, but hopefully it will. In the meantime, there are four short videos from it to be found on YouTube along with a great many more videos from the same institution on both related and unrelated themes. There is also some limited access to the Library's sound collection