I'm afraid I'm going to disagree with you, C.
That's cool. Not everyone reacts the same and different riders are going to have different priorities during a stressful encounter like this.
My priorities are:
1. Not getting myself into a dangerous situation in the first place
2. Giving myself the best chance of surviving uninjured if there is a collision
3. Making sure that in the event of a near miss, the driver responsible for the incident is left under no illusion just how pissed off I am about his stupidity
If, despite being well lit, giving clear signals and riding wide, someone attempts to overtake me, leaving so little room that I’m genuinely concerned that they might hit me, I’m going to react badly.
Driving like a tosser is one thing, trying to kill me is another and the very least that they can expect is a wallop on the side of their car. On the rare occasions I sense a vehicle approaching too close, I tend to take my offside hand off the bars anyway. It means I can maintain the survival space off to my nearside, without being bullied into diving for the kerb, but crucially, I can make myself appear wider to the motorist and
feel if they come that close. This means I can keep my focus on the road in front of me – the last thing you need when you’re dealing with an overtaker like this is to be distracted from where you’re going and stick your front wheel in a pothole or something.
Also - I want drivers who try to kill me to know that I am angry and I’m spiky and I bite back. Then maybe the next time they're tempted to try the same trick with another cyclist, they might think twice.
Your mileage (as they say) may vary.