Of course, because there is no way the BBC will move Graham Norton Show for this debate.
Of course there's a way! You should know that BBC Northern Ireland move it every week already for The Blame Game. And if "there is no way" they will move Graham Norton, surely there is equally "no way" they can move 'stEnders, HIGNFY, WILTY or the other shows on Fridays at the moment.
If something needs to be moved to fit something else in, it will be moved. They're telly programmes, not train services. If it's moved or dropped for a week, people will cope.
The other day someone was suggesting ITV couldn't do an election debate because of a Martin Lewis programme. These programmes CANNOT BE STOPPED.
Could international broadcast rights factor into this?
Let's assume that the BBC must air GN before either Virgin Media One or UKTV Australia air it (I don't know if that is a thing in the GN contract, but it appears to be with His Dark Materials at the moment, as HBO are waiting until Monday morning to make it available elsewhere in Europe for streaming, and we know it was a thing with Killing Eve as it was mentioned on Points of View).
If it is the case, then those two broadcasters would then have to scramble to air a repeat or another show entirely in it's place and would be annoyed at the BBC for having delayed the airing of the show despite it being scheduled now.
It's possible the BBC could move Graham Norton to a later slot, but surely moving GN to another day is off the table entirely in that situation?