Click on the link, then 'listen to the latest programme' in the RHC, hit the 'skip 5 min' button a few times till you get to the 37min mark.
It's an interesting piece written for three 'e-bowed' guitars. Amazing what these things can do!
http://www.bbc.co.uk/radio3/world/mixingit.shtml
Edit: PS it's only up till Friday then the show changes