Unnecessary Overtaking Manoeuvres are so common, I've abbreviated it and frequently mutter to myself 'another UOM'. Maybe it's hard wired into the cultural conscious that "bicycle is slow vehicle, must overtake". It becomes, "must not read the road ahead, must overtake" with the attendant last minute braking at traffic queues. Then of course, you'll filter, they'll fume. I try and remember 'it's their heart attack'.
Coming down the road the other day, going quite fast, probably noodling above the 20mph speed limit, started to slow for a right turn at the t junction ahead. There's an itchy car close behind. As soon as the road opened up just before the junction, the car just had to go. So it overtakes and ends up at the t junction on the wrong side of the road. Amusingly, there's another large wankpanzer attempting to turn into the road. So, it's face off time, because this is south-east London and no one can give way. Remember kids, giving way makes you gay. Or straight, depending on your starting preference.
Lady in the overtaking car then glares at me as I wait at the junction for a gap in the traffic and plaintively cries "why didn't you slow down?" Hmm, I'm stopped at the junction. I'm pretty sure the mechanism for this involved slowing down. It was nice, warm, smug feeling as I turned and left the two drivers snarling at one another.
But it's not just bikes. Coming back from the supermarket on Sunday, we had a Merc hanging like a limpit on our rear bumper. Did the same thing as soon as the junction came into view. Had to cut the corner severely onto a main road at speed, and only by the graces of any deity was there nothing coming down Elmer's End Road, because it would have been a head-on. Astoundingly, the idiotmobile went into a development about 50 metres further up the road. Evidently well worth risking the life of yourselves and others to get to your destination a few seconds earlier.
The horn on a Ford Ka is, incidentally, pathetic. More of a asthmatic parp. Certainly not enough to put errant overtakers in their place. I think some kind of brown noise targeting device would be good in these situations.