An instruction for pedestrians in England (and other places) where they drive on the left side of the road. Assists visitors and tourists who are not accustomed to the different driving pattern.
When walking around in London, look right first before crossing the street.
look right: define #2
usually referrs to a male, means that he looks fresh and all his ish is in the right place in the right way;to look handsome or cute
Girl: Ooh, he look right!