Unable to download a pid

[Arthur Murray]

Trying to get this in HD:

http://www.bbc.co.uk/programmes/b04xw2x8

It fails to get (404):
http://open.live.bbc.co.uk/mediaselector/5/select/version/2.0/mediaset/pc/vpid/b04zq2w0?cb=99015

But

http://open.live.bbc.co.uk/mediaselector/5/select/version/2.0/mediaset/pc/vpid/b0520nmw/atk/a091b745f823050f50ad145c7a0a21b470e0907e/asn/1/

contains the link to the HD stream according to

http://www.bbc.co.uk/iplayer/episode/b04xw2x8/the-superrich-and-us-episode-1

How do I get gip to use it?