He spoke to The Doctor Who Online WhoCast Podcast this week about his progress on the score for series 9, and gave a teaser about a song he has written for it. He said:
"I've already started on episode three. I've seen episode three so far and I've written a song for another episode.Series 9 will air this autumn.
A song - there's some people playing instruments in the background and they're singing stuff. They need a song. So that's always fun!"
[Source: Blogtor Who]