I love Skins!!!! Anyway I tried looking it up but I can't seem to find it. Was the song in Effy's episode from series 1? If so check this list of songs from the Skins website and see if the song is one of them http://funadvice.com/r/3kaqof69t3 Hope you find what you're looking for
http://funadvice.com/r/3kaqoka2r4 This may be the song.. It sounds like it but the lyrics are just a little bit different. If it isn't sorry! :)
Is it Crimson by Edge of Sanity?
Lovely, thank you.