I do think the regional politics show will end up moving at some point to a late night slot.
The problem with the regional politics show, as with regional news, is that it's not of equal interest across the UK.
So in Scotland, which has a devolved parliament and an ongoing independence debate, there's a shared interest in a lot of issues that are being talked about. Northern Ireland has an entirely different political system which requires its own show, especially given the lack of knowledge about how NI works across most of the UK.
Whereas in London, the region is too big and has too many local councils etc to cover in a way the whole audience would care about. And the national news sweeps up the rest.