Music Copyright- Asking permission for music

Even though my film will be used only for my work and won't be seen by anyone other than teachers, fellow students and the exam board, I have still contacted the record label that the song has come from, just for precaution.

This is the email that I sent:

To be clear, the email is to the licensing department of the record company: Ninja Tune. 

It reads: To whom this may concern at Ninja Tune, I am emailing you to request the permission to use a song by a band under your record label. The song is To Build a Home by the band The Cinematic Orchestra. the song will not be used for trading purposes and will by no means be used for financial gain. If given permission, I will be using this song for educational use only, as part of some college work. Thank you for your time, Megan Quill "

This just clarifies that I would like to use their music, but only for college work, to avoid any copyright issues.