Quicksand Fans

I have very recently watched the "Boomtown" episode of Dr Who (season 2005 episode 11) and realized that there is a brief segment during which the background music, to my ears at least, consists of several very key bars from Clara's Theme. Clara herself does not appear until nearly a decade later and under a different executive producer so it is probably a coincidence. Does anyone know anything about this? The music occurs at about the 23:20 mark.

A coincidence, definitely.
Murray Gold likely just has some preferred notes.
I'm a huge fan of the show and the soundtracks and listen to them very often.
I've thought I've heard certain themes, as well, but actually haven't.
Good ear, though, Fred.