Question Author
Hi Chazza..
You're right, it was a bend. He didnt appear to be indicating.. he wasnt so much changing lane, as moving across to span both lanes as they narrow.
He had no choice but to span the two lanes due to the size of the vehicle, but i was already in the left lane when he did it..
He says i was overtaking, but i wasalready in the lane on the one way system that i had needed to be in, and had been in that lane from when the traffic lights turned green and we all moved off.