I always watch Question Time on BBC1, at the end it is said that the discussion continues on Radio 4.
I recorded Any Questions on Radio 4 today (which I assume is a repeat from Thursday night) and it's a completely different panel!
http://www.bbc.co.uk/programmes/b077ypfm
http://www.bbc.co.uk/programmes/b077jqq1
Does anybody au fait with Radio 4 know what the position is?