If as a driver, you're going to move into a left filter lane, and you see a cyclist not too far behind you in your passenger door mirror, what would you do? The filter lane is to the left of the cycle lane, so you must cut across it. Today, I (driver) put my indicator on and slowed right down, despite the vehicle in front of me just cutting right across the cyclist. The cyclist is still moving at this point, so I practically stop at which point he proceeds to give me a load of verbal abuse I didn't actually hear. He still doesn't stop though, moving along with my car, so I stop at this point as I am running out of lane. To which I get even more abuse, and finally he stops behind me and I move over. I have no idea what I did wrong. I may have been a bit hesitant, but I had no idea if he had seen my indicator and/or what his intentions were! I expect nobody would pass somebody turning left, but I don't assume.