I'm baffled. The video that BentMikey put up had no aggression in it at all from that first overtake. Anyone who believes "too close mate, too close" qualifies as being overly aggressive is clearly insane! Or has BentMikey added an uncensored attack video that I've missed? Saying "F Off" while being so closely overtaken sounded like just a reaction and even if he'd looked around at the cab and said it while sticking up his middle finger it doesn't make it ok for the cab driver to get so close.
As for the comments that say "do nothing mate, let them treat you however they want to" then every time you get treated on the road with respect while riding your bike you need to say a quiet thank you to all the cyclists who point out when a car is too close in a non-aggressive way (by saying something like ... I don't know ... maybe "too close mate, too close")
Some non cycling drivers possibly don't realise they need to give way at pinch points etc as maybe that didn't stick in their mind after they passed their driving test, so having a decent cyclist give them a sign that they felt a bit threatened by the overtake is a good thing. Otherwise they'll just think they did the right thing and carry on doing it. Those drivers that pass too close to prove or point or just to be an idiot may think twice if they know they'll be spoken to about it!
So, thank you BentMikey for your assertive cycling.
But those too idle to do anything need to realise it's the likes of BentMikey etc that make the roads easier for people like you to be able to enjoy your ride. If we all had the attitude of "treat me however you like, I'll pretend I haven't noticed" then it would actually be all our funerals.