To take a random example - the Laura Kuenssberg show on Sunday morning. It's on YouTube and elsewhere, you can see it. An hour long, started with the papers for 5 minutes and then an interview with Robert Jenrick (Tory former immigration minister) followed by an interview with Michael Gove (Tory cabinet minister). 30 minutes of the show taken up with these interviews.
Then an interview with the First lady of Ukraine.
And the last 10 minutes an interview with Liz Kendall from Labour.
So in terms of screen time - 30 minutes to the Tories, 10 to Labour.
Let's pick another random date. The week before. An interview with (Tory) Victoria Atkins runs for 14 minutes and is first up, Ends with an interview with Jonathan Reynolds (Labour) which lasts 9 minutes.