Hi there, can't give you any definite info at the moment as the series is not scheduled - all I can tell you is that it will be coming to Channel 4 at some stage.
It's available on 4oD for free if that's any use to you? It's shown too late for me on a Sunday as well, as I've got an early start on Mondays so I tend to watch it on a Tuesday afternoon .
4oD is free to download from the C4 website if you don't already have it.