Rare for me. Wet roads in drizzle, lunchtime today, I'd signalled right to overtake a parked HGV but was about to turn right (into a private driveway: my workplace as it happens) just beyond the end of the parked lorry. So I stayed on the crown of the road.
I'm fairly sure I continued to signal right as I was overtaking, to make my intention clear.
Not clear enough for following WVM (well not strictly White Van, it was only one of those 15cwt jobs), he must have reasoned 'it's only a bike, and he's only overtaking the lorry, plenty of room for me too' (there wasn't). Came to a spectacular skidding halt a few feet short of hitting me. Very scary!
What can one do? I can see how one's hand signal may be misinterpreted, but he was wrong to double-overtake anyway.
Incidentally there was no exchange of words. He just drove off.