Help finding a song in Closing Time from Series 6.

Hello my fellow Whovians!

I need your help finding a song used in Doctor Who episodes. In my relatively short search, I could only find the song being used once but I feel like I've heard it multiple times in multiple episodes and I'd love to give it a listen by itself.

The example I have is at the end of the episode "Closing Time" from series 6. On amazon it starts playing around 43:30, right as River is being interrogated by Madame Kovarian. As they start bringing her astronaut outfit out, the song starts playing, and plays throughout the rest of the episode, until she is seen floating in Lake Silencio at the end. Hopefully this lets you guys locate it.

Does anyone know the name of that song, or any other better examples of it being played louder and longer in any other episodes? Or, if there is a YouTube link to the song in question?

Thanks for your help my beloved friends! I appreciate any effort you give me, and will try to repay your efforts with my own in the future.