Classical piece - University of British Columbia

My apologies if this is not the appropriate forum for classical music.

I heard this piece at a classical concert at the University of British Columbia while I was visiting the area. The composer might have been Gustav Holst, but I'm very unsure about that. I remember only two concrete things about the piece: it had a distinctive ostinato, and it ended with a bass clarinet or bassoon playing the ostinato followed by the piano striking and holding a single chord on the off-beat.

You didn't say when you were there, but have a look here - scroll to the bottom and select a date, you might find it : http://www.music.ubc.ca/events.html