Heliomass wrote:
Apologies if this question has been asked/answered before. I was
curious as to why, on the Northern line's city branch, the platforms
at Bank and London Bridge are "reversed". i.e., why do the running
lines swap sides during this stretch?

Many thanks,


In most places the early deep level lines were built under the road. In
order to stay under the road through a tight bend or corner the tunnels swap
from side to side to ease the curve for the trains allowing a higher speed
to be maintained.