Because the street is a one-way street and you are turning left further ahead, you must position yourself to the left. This will improve traffic handling (as you are not obstructing cars on the right-hand side of the street going straight or turning right).

When driving on the left-hand side of a one-way street, you should pay special attention to the following:

Pedestrians not expecting you in the left-hand lane.

Cyclists travelling in the opposite direction of travel.

On reaching the crossroad: Cars coming from the left that may be surprised by your positioning. On reaching the crossroad: Cars coming from the left that may be surprised by your positioning.