Just reposting the link that JohnJ posted earlier in the thread in case anyone missed it.
Shanties on BBC iPlayer - Watch online.
iPlayer shows are usually available for about a month after broadcast (IIRC), so the link will expire eventually.
For those unfamiliar with iPlayer, if you have a broadband connection you can watch shows online. Most broadcasters have an equivalent - ITV, Channel 4 etc etc...
I posted some praise on the PoV message board earlier, but as I'm only an occasional participant in BBC discussions, I have to wait for my comments to be checked by a mod before they appear.