1. The previous night we’ll have performed in front of 800 people. On 15th December, we will perform to more than 100 times that number, and even more via NT Live Encore screenings. That’s the equivalent of playing to nearly five times the capacity of the Hollywood Bowl. Or more than 13 times the capacity of Sydney Opera House.

2. But once the show has started, the audience in the theatre is what we need to pay attention to. This is a live broadcast of a play, not a film of the play. If the audience in the theatre is laughing, then audiences in cinemas around the world are laughing too.

3. The NT Live Sound team can hide that microphone pack anywhere, and I mean anywhere. The microphone itself might be hidden in your hairline or inside your collar, but I’ve often had the battery pack (about the size of matchbox) lodged securely in my flesh-toned briefs.

4. Remember that your microphone is always on. When you come off-stage for a few moments and fancy a quick toilet break, make sure the microphone is switched off. Don’t ask how I learned this pearl of wisdom.

5. We will hopefully receive standing ovations all over the world, all at the same time. And then, when you’re in the bath and least expect it, a standing ovation might be taking place at an Encore screening in 2017.