An actual TV programme on actual TV will surely need higher production values than a podcast that is filmed. Therefore surely there will be hardly any saving compared to This Week (which is hardly high budget)
They might just use the existing cameras in many of the studios. Clearly presenters, guests and most of the production team are already in place so little additional cost compared to presumably This Week.
I do hope it doesn't change the essence and feel of the programme though and that this doesn't hinder their ability to rabbit on without a fixed timeslot for the podcast.