I’ve tinkered with the code for the original 1.0 of the bbc iplayer software so it no longer insists on player shows over wifi. Find yourself a copy of the original (here: http://gerrymoth.googlepages.com/iplayer.wgz).
Rename it to a “.zip” file extract the content and edit the file called “app-min.js” in the iplayer/js/ folder using notepad.
Search for this string: data.response.IP_CONNTYPE===”wifi”&&data.response.IP_IS_UK_COMBINED===”yes”
and delete this part:
data.response.IP_CONNTYPE===”wifi”&&
Save the file.
Go up the folders and zip up the “iplayer” folder again. Rename it to a .wgz file and install it on to your phone.