Michael Bell wrote:

They can only overtake each other if there is space, which there often
isn't, especially in London, and even if there is space they sometimes
don't, sometimes out of mental laziness, and sometimes, I am sure, out
of wish to avoid work. Let the other man carry the load!. Though I
have sometimes seen examples of very good working, a pair of busses
overtaking each other to take alternate stops.


Pity the poor passengers who wanted to get off at the stops "their"
bus didn't stop at.

;-)