Heading towards Swindon earlier, following a pair of ditherers, thought they were together. Later appeared not to be so.
Arriving at a roundabout (A420 Watchfield for those that know the area), both of these placed themselves accurately in the left lane, no signals, so apparently taking 2nd exit, 12 O'clock.
I entered the roundabout in the right lane, to turn right, 3rd exit, 2 O'clock.
The first car got almost to the point of no return at teh 2nd exit, and pulled violently right, surprising the car waiting to enter at that exit, and headed for the 3rd exit.
I was already 2/3 past the second car, so accelerated to get ahead, before she could swerve. Swerve she did, whilst looking firmly to her left, to avoid hitting the bollards. No thought to what might be to her right.
Still enough space, and I was ahead of her, althogh not fully. She did not respond until I parped the horn for the third time. (Quite loud, a nice pair of aftermarket Fiaams)
I exited ahead of her, and behind could see her looking a bit puzzled as to what happened.
If the left lane goes to all three exits, where does the right lane go then?
A few miles later, just before Swindon, there is a petrol station on the right, with 4 'no right turn' signs. From behind me, she turned right into the petrol station.
200 yards on is Sainsbury's, several pence per litre cheaper.