I noticed a cyclist doing that on my way home facing streatham hill station on the high road towards brixton while over in the left lane that turns behind the station. I shouted over to warn the car behind her was edging and going to hook her then she pulled out headphones and said "what?" and I repeated and she went "I'm going straight". All the shouting made the driver wait for her to move across and I blocked the driver behind me and rode 2 abreast till it was more clear, could have been messy.
I noticed a cyclist doing that on my way home facing streatham hill station on the high road towards brixton while over in the left lane that turns behind the station. I shouted over to warn the car behind her was edging and going to hook her then she pulled out headphones and said "what?" and I repeated and she went "I'm going straight". All the shouting made the driver wait for her to move across and I blocked the driver behind me and rode 2 abreast till it was more clear, could have been messy.