On May 7, 9:39 am, "Peter Masson" wrote:
"MIG" wrote



But the rule seems to be "if it's defined as an interchange, make
people use it regardless of difficulty,

More or less forced by Oyster technology - if you go out of the station
you'll be charged for a new journey when you go back into the system. How do
things work at Hammersmith when changing between the H&C and other lines?



Some pairs of stations allow "continuation", eg Heron Quays/Canary
Wharf and Bow Church/Bow Road, and (presumably) Hammersmith. They
could program that possibility into Bank/Cannon Street (the walk can't
be any longer) rather than send people from the Waterloo and City by
such a long and difficult route.