OK, so it was "right on top" in the search but:

"Currently BBC iPlayer TV programmes are available to play in the UK only, but all BBC iPlayer Radio programmes are available to you. Why?
If you are in the UK and see this message please read this advice.
Go to Radio channels home page"

For those that are in UK: http://www.bbc.co.uk/iplayer/episode/b00mqg2c/Balmoral/