10 year olds in the UK are being taught how and when to use the center of the lane

RIDING POSITIONS
Primary Position
* A position that is further out from the kerb, taking control of the entire width of the lane.
* Following traffic must stay behind or use the next lane to overtake.
* This position is used when passing road junctions and road narrowings, or when the cyclist wishes to discourage other traffic
from overtaking.
Secondary Position
* A position up to a metre away from the kerb, allowing traffic to pass in the same lane.

https://www.bikeability.org.uk/downloads/Bikeability_skills%20course2.pdf
Home page: https://www.bikeability.org.uk/oldId.20071119154150372