Pre recording a political debate show in the current climate would be risky wouldn't it? Things are changing so quickly it would be easy for an unforeseen Ministerial resignation to render the whole programme unbroadcastable.
It's a strange climate at the moment - on the one hand you're right, things can change so quickly. On the other thought nothing has bloody changed for ages.
Given most MPs have clocked off by lunchtime on Friday pre-recording on a Friday for broadcast on Saturday is probably less risky than Perston pre-recording a couple of hours early on a Wednesday night.
I preferred the internet when it had a sense of humour.