I think I was quite clear about this, so I'm not going to derail the thread any further by trying to explain it to you.
Patronising
and evasive. Well done! YellowTim will be proud.
You seem to think that the tipper truck driver indicating late is the only issue. It is not. The driver could have decided to barge into the next lane - the rear would probably swing out and crush any cyclist there. He could have veered left even if he were going straight on - there's so little room that any cyclist there would inevitably go under the wheels with even a few centimetre deviation. The cyclist could have ended up getting a rucksack or clothing entangled in the truck - same result. There are 101 different things that could have happened,
and not all of them can be blamed on the driver.
But since you seem to be so hung on his late signalling, how many drivers don't bother signalling at lights? 10%? 20%? A significant fraction. It does not require "mind reading" to suspect the possibility that the truck will be turning left, merely observation that many drivers don't indicate, hence
anticipating that this is a very possible outcome. And, yes, yes, yes, no one should have to anticipate this. But that isn't going to save any cyclist going down there. And really, I should
not have to explain this to you, should I?