Channel 4 menu music

Just now at the end of an anouncement on Channel 4.
"If you like the music you hear during our menu's and would like to know more about it visit www.channel4.com/music ."

http://www.channel4.com/entertainment/4music/whatson/tvtrailer.html

To be very exact.

I did notice that they were using songs over the menus, but how will this work in a business point of view? Would the record companies pay channel 4 to use their song as a form of promotion? Or would Channel 4 pay the record companies to use their music?

I'd have thought C4 would have to make PRS payments.

BBC and ITV have a contract which they pay for, and can use any music in that collection, channel4 do it song by song