The music in the BBC iPlayer trailer is by Wouter Hamel - "See You Once Again" from the album "Nobody's Tune". I don't think it's been released in the UK yet.
Look on Lyrics mania. http://www.lyricsmania.com/lyrics/say_anything_lyrics_2979/
in the beginning
It's called "Laughing Eyes" by The Coral. There's a video for it on YouTube
No Led Zeppelin song contains those lyrics. Perhaps you are looking for Break On Through by The Doors.
One can find the lyrics to the song "Baby" from the following lyrics websites: AZ Lyrics, Metro Lyrics, Sing 365, Lyrics 007, Lyrics Freak, Lyrics Mania, Song Lyrics, to name a few.
Donny Osmond's song Twelfth of never contains those lyrics
Mary's Song contains those lyrics.
young folks!
Kick In The Door - The Notorious B.I.G.
"My Home" by Heirline
Me
"Wait for You" by Elliot Yamin.