Please put my mind at rest you don’t actually drive do you?
Strange comment – you think that being considerate is dangerous?
Being overtaken. If a driver is trying to overtake you, maintain a steady course and speed, slowing down if necessary to let the vehicle pass. Never obstruct drivers who wish to pass. Speeding up or driving unpredictably while someone is overtaking you is dangerous. Drop back to maintain a two-second gap if someone overtakes and pulls into the gap in front of you.
Be considerate. Be careful of and considerate towards all types of road users, especially those requiring extra care (see Rule 204). You should
try to be understanding if other road users cause problems; they may be inexperienced or not know the area well
be patient; remember that anyone can make a mistake
not allow yourself to become agitated or involved if someone is behaving badly on the road. This will only make the situation worse. Pull over, calm down and, when you feel relaxed, continue your journey
slow down and hold back if a road user pulls out into your path at a junction. Allow them to get clear. Do not over-react by driving too close behind to intimidate them
So what do you think the considerate thing to do in that case above then? Certainly not what he did and creep forwards even though he could see the focus was coming out anyway.